1000000000  

Cardinal  One billion (short scale) One thousand million, or one milliard (long scale) 
Ordinal  One billionth (short scale) 
Factorization  2^{9} · 5^{9} 
Greek numeral  
Roman numeral  M 
Binary  111011100110101100101000000000_{2} 
Ternary  2120200200021010001_{3} 
Quaternary  323212230220000_{4} 
Quinary  4022000000000_{5} 
Senary  243121245344_{6} 
Octal  7346545000_{8} 
Duodecimal  23AA93854_{12} 
Hexadecimal  3B9ACA00_{16} 
Vigesimal  FCA0000_{20} 
Base 36  GJDGXS_{36} 
1,000,000,000 (one billion, short scale; one thousand million or milliard, yard,^{[1]} long scale) is the natural number following 999,999,999 and preceding 1,000,000,001. One billion can also be written as b or bn.^{[2]}^{[3]}
In scientific notation, it is written as 1 × 10^{9}. The metric prefix giga indicates 1,000,000,000 times the base unit. Its symbol is G.
One billion years may be called eon/aeon in astronomy or geology.
Previously in British English (but not in American English), the word "billion" referred exclusively to a million millions (1,000,000,000,000). However, this is no longer common, and the word has been used to mean one thousand million (1,000,000,000) for several decades.^{[4]}
The term milliard can also be used to refer to 1,000,000,000; whereas "milliard" is seldom used in English,^{[5]} variations on this name often appear in other languages.
In the South Asian numbering system, it is known as 100 crore or 1 arab.
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Transcription
Contents
 1 Sense of scale
 2 Selected 10digit numbers (1,000,000,001–9,999,999,999)
 2.1 1,000,000,001 to 1,999,999,999
 2.2 2,000,000,000 to 2,999,999,999
 2.3 3,000,000,000 to 3,999,999,999
 2.4 4,000,000,000 to 4,999,999,999
 2.5 5,000,000,000 to 5,999,999,999
 2.6 6,000,000,000 to 6,999,999,999
 2.7 7,000,000,000 to 7,999,999,999
 2.8 8,000,000,000 to 8,999,999,999
 2.9 9,000,000,000 to 9,999,999,999
 3 References
Sense of scale
The facts below give a sense of how large 1,000,000,000 (10^{9}) is in the context of time according to current scientific evidence:
Time
 10^{9} seconds is 114 days short of 32 calendar years (≈ 31.7 years).
 More precisely, a billion seconds is exactly 31 years, 8 months, 2 weeks, 1 day, 17 hours, 46 minutes, and 40 seconds.
 About 10^{9} minutes ago, the Roman Empire was flourishing and Christianity was emerging. (10^{9} minutes is roughly 1,901 years.)
 About 10^{9} hours ago, modern human beings and their ancestors were living in the Stone Age (more precisely, the Middle Paleolithic). (10^{9} hours is roughly 114,080 years.)
 About 10^{9} days ago, Australopithecus, an apelike creature related to an ancestor of modern humans, roamed the African savannas. (10^{9} days is roughly 2.738 million years.)
 About 10^{9} months ago, dinosaurs walked the Earth during the late Cretaceous. (10^{9} months is roughly 83.3 million years.)
 About 10^{9} years—a gigaannus—ago, the first multicellular eukaryotes appeared on Earth.
 About 10^{9} decades ago, galaxies began to appear in the early Universe which was then 3.799 billion years old. (10^{9} decades is roughly 10 billion years.)
 It takes approximately 95 years to count from one to one billion in a single sitting.^{[6]}
 The universe is thought to be about 13.8 × 10^{9} years old.^{[7]}
Distance
 10^{9} inches is 15,783 miles (25,400 km), more than halfway around the world and thus sufficient to reach any point on the globe from any other point.
 10^{9} metres (called a gigametre) is almost three times the distance from the Earth to the Moon.
 10^{9} kilometres (called a terameter) is over six times the distance from the Earth to the Sun.
Area
 A billion square inches would be a square about one half mile on a side.
 A piece of finely woven bed sheet cloth that contained a billion holes would measure about 500 square feet (46 m^{2}), large enough to cover a moderate sized apartment.
Volume
 There are a billion cubic millimetres in a cubic metre and there are a billion cubic metres in a cubic kilometre.
 A billion grains of table salt or granulated sugar would occupy a volume of about 2.5 cubic feet (0.071 m^{3}).
 A billion cubic inches would be a volume comparable to a large commercial building slightly larger than a typical supermarket.
Weight
 Any object that weighs one billion kilograms (2.2×10^{9} lb) would weigh about as much as 5,525 empty Boeing 747400s.
 A cube of iron that weighs one billion pounds (450,000,000 kg) would be 1,521 feet 4 inches (0.28813 mi; 463.70 m) on each side.
Products
 As of July 2016, Apple has sold one billion iPhones.^{[8]} This makes the iPhone one of the most successful product lines in history, surpassing the PlayStation and the Rubik's Cube.
 As of July 2016, Facebook has 1.71 billion users.^{[9]}
Nature
 A small mountain, slightly larger than Stone Mountain in Georgia, United States, would weigh (have a mass of) a billion tons.
 There are billions of worker ants in the largest ant colony in the world,^{[10]} which covers almost 4,000 miles (6,400 km) of the Mediterranean coast.
 In 1804, the world population was one billion.
Count
A is a cube; B consists of 1000 cubes the size of cube A, C consists of 1000 cubes the size of cube B; and D consists of 1000 cubes the size of cube C. Thus there are 1 million Asized cubes in C; and 1,000,000,000 Asized cubes in D.
Selected 10digit numbers (1,000,000,001–9,999,999,999)
1,000,000,001 to 1,999,999,999
 1,000,000,007 – smallest prime number with 10 digits.^{[11]}
 1,023,456,789 – smallest pandigital number in base 10.
 1,026,753,849 – smallest pandigital square that includes 0.
 1,073,676,287 – 15th Carol number.^{[12]}
 1,073,741,824 – 2^{30}
 1,073,807,359 – 14th Kynea number.^{[13]}
 1,111,111,111 – repunit, also a special number relating to the passing of Unix time.
 1,129,760,415 – 23rd Motzkin number.^{[14]}
 1,134,903,170 – 45th Fibonacci number.
 1,162,261,467 – 3^{19}
 1,220,703,125 – 5^{13}
 1,232,922,769 – Centered hexagonal number.
 1,280,000,000 – 20^{7}
 1,234,567,890 – pandigital number with the digits in order.
 1,311,738,121 – 25th Pell number.^{[15]}
 1,382,958,545 – 15th Bell number.^{[16]}
 1,406,818,759 – 30th Wedderburn–Etherington number.^{[17]}
 1,475,789,056 – 14^{8}
 1,631,432,881 – Triangular square number.
 1,673,196,525 – Lowest common multiple of the odd integers from 1 to 25
 1,787,109,376 – 1automorphic number^{[18]}
 1,836,311,903 – 46th Fibonacci number.
 1,882,341,361 – The smallest prime whose reversal is both square (40391^{2}) and triangular (triangular of 57121).
 1,977,326,743 – 7^{11}
2,000,000,000 to 2,999,999,999
 2,038,074,743 – 100,000,000th prime number
 2,147,483,647 – 8th Mersenne prime and the largest signed 32bit integer.
 2,147,483,648 – 2^{31}
 2,176,782,336 – 6^{12}
 2,214,502,422 – 6th primary pseudoperfect number.^{[19]}
 2,357,947,691 – 11^{9}
 2,562,890,625 – 15^{8}
 2,971,215,073 – 11th Fibonacci prime (47th Fibonacci number).
3,000,000,000 to 3,999,999,999
 3,166,815,962 – 26th Pell number.^{[15]}
 3,192,727,797 – 24th Motzkin number.^{[14]}
 3,323,236,238 – 31st Wedderburn–Etherington number.^{[17]}
 3,405,691,582 – hexadecimal CAFEBABE; used as a placeholder in programming.
 3,405,697,037 – hexadecimal CAFED00D; used as a placeholder in programming.
 3,735,928,559 – hexadecimal DEADBEEF; used as a placeholder in programming.
 3,486,784,401 – 3^{20}
4,000,000,000 to 4,999,999,999
 4,294,836,223 – 16th Carol number.^{[12]}
 4,294,967,291 – Largest prime 32bit unsigned integer.
 4,294,967,295 – Maximum 32bit unsigned integer (FFFFFFFF_{16}), perfect totient number, product of the five prime Fermat numbers through .
 4,294,967,296 – 2^{32}
 4,294,967,297 – , the first composite Fermat number.
 4,295,098,367 – 15th Kynea number.^{[13]}
 4,807,526,976 – 48th Fibonacci number.
5,000,000,000 to 5,999,999,999
 5,159,780,352 – 12^{9}
 5,354,228,880 – superior highly composite number, smallest number divisible by all the numbers 1 through 24
 5,784,634,181 – 13th alternating factorial.^{[20]}
6,000,000,000 to 6,999,999,999
 6,103,515,625 – 5^{14}
 6,210,001,000 – only selfdescriptive number in base 10.
 6,227,020,800 – 13!
 6,975,757,441 – 17^{8}
 6,983,776,800 – 15th colossally abundant number,^{[21]} 15th superior highly composite number^{[22]}
7,000,000,000 to 7,999,999,999
 7,645,370,045 – 27th Pell number.^{[15]}
 7,778,742,049 – 49th Fibonacci number.
 7,862,958,391 – 32nd Wedderburn–Etherington number.^{[17]}
8,000,000,000 to 8,999,999,999
 8,212,890,625 – 1automorphic number^{[18]}
 8,589,869,056 – 6th perfect number.^{[23]}
 8,589,934,592 – 2^{33}
9,000,000,000 to 9,999,999,999
 9,043,402,501 – 25th Motzkin number.^{[14]}
 9,814,072,356 – largest square pandigital number, largest pandigital pure power.
 9,876,543,210 – largest number without redundant digits.
 9,999,999,967 – greatest prime number with ten digits.^{[24]}
References
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 ^ "figures". The Economist Style Guide (11th ed.). The Economist. 2015.
 ^ "6.5 Abbreviating 'million' and 'billion'". English Style Guide: A handbook for authors and translators in the European Commission (PDF) (8th ed.). European Commission. 3 November 2017. p. 32.
 ^ "How many is a billion?". OxfordDictionaries.com. Retrieved 13 November 2017.
 ^ "billion,thousand million,milliard". Google Ngram Viewer. Retrieved 13 November 2017.
 ^ "How Much is a Billion?". Math Forum. Retrieved 13 November 2017.
 ^ "Cosmic Detectives". European Space Agency. 2 April 2013.
 ^ Panken, Eli (27 July 2016). "Apple Announces It Has Sold One Billion iPhones". NBCNews.com. Retrieved 13 November 2017.
 ^ Seethamaram, Deep (27 July 2016). "Facebook Posts Strong Profit and Revenue Growth". The Wall Street Journal. Retrieved 13 November 2017.
 ^ Burke, Jeremy (16 June 2015). "How the World Became A Giant Ant Colony". Atlas Obscura. Retrieved 13 November 2017.
 ^ Sloane, N. J. A. (ed.). "Sequence A003617 (Smallest ndigit prime)". The OnLine Encyclopedia of Integer Sequences. OEIS Foundation.
 ^ ^{a} ^{b} Sloane, N. J. A. (ed.). "Sequence A093112 (a(n) = (2^n1)^2  2)". The OnLine Encyclopedia of Integer Sequences. OEIS Foundation.
 ^ ^{a} ^{b} Sloane, N. J. A. (ed.). "Sequence A093069 (a(n) = (2^n + 1)^2 )". The OnLine Encyclopedia of Integer Sequences. OEIS Foundation.
 ^ ^{a} ^{b} ^{c} Sloane, N. J. A. (ed.). "Sequence A001006 (Motzkin numbers)". The OnLine Encyclopedia of Integer Sequences. OEIS Foundation.
 ^ ^{a} ^{b} ^{c} Sloane, N. J. A. (ed.). "Sequence A000129 (Pell numbers)". The OnLine Encyclopedia of Integer Sequences. OEIS Foundation.
 ^ Sloane, N. J. A. (ed.). "Sequence A000110 (Bell or exponential numbers)". The OnLine Encyclopedia of Integer Sequences. OEIS Foundation.
 ^ ^{a} ^{b} ^{c} Sloane, N. J. A. (ed.). "Sequence A001190 (WedderburnEtherington numbers)". The OnLine Encyclopedia of Integer Sequences. OEIS Foundation.
 ^ ^{a} ^{b} Sloane, N. J. A. (ed.). "Sequence A003226 (Automorphic numbers)". The OnLine Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 20190406.
 ^ Sloane, N. J. A. (ed.). "Sequence A054377 (Primary pseudoperfect numbers)". The OnLine Encyclopedia of Integer Sequences. OEIS Foundation.
 ^ Sloane, N. J. A. (ed.). "Sequence A005165 (Alternating factorials)". The OnLine Encyclopedia of Integer Sequences. OEIS Foundation.
 ^ Sloane, N. J. A. (ed.). "Sequence A004490 (Colossally abundant numbers)". The OnLine Encyclopedia of Integer Sequences. OEIS Foundation.
 ^ Sloane, N. J. A. (ed.). "Sequence A002201 (Superior highly composite numbers)". The OnLine Encyclopedia of Integer Sequences. OEIS Foundation.
 ^ Sloane, N. J. A. (ed.). "Sequence A000396 (Perfect numbers)". The OnLine Encyclopedia of Integer Sequences. OEIS Foundation.
 ^ "Greatest prime number with 10 digits". Wolfram Alpha. Retrieved 13 November 2017.