21491021994
21,491,021,994 is an even composite number composed of six prime numbers multiplied together.
21491021994 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of sixty-four divisors.
Prime factorization of 21491021994:
2 × 3 × 13 × 31 × 659 × 13487
See below for interesting mathematical facts about the number 21491021994 from the Numbermatics database.
Names of 21491021994
- Cardinal: 21491021994 can be written as Twenty-one billion, four hundred ninety-one million, twenty-one thousand, nine hundred ninety-four.
Scientific notation
- Scientific notation: 2.1491021994 × 1010
Factors of 21491021994
Divisors of 21491021994
- Number of divisors d(n): 64
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Complete list of divisors:
1 2 3 6 13 26 31 39 62 78 93 186 403 659 806 1209 1318 1977 2418 3954 8567 13487 17134 20429 25701 26974 40461 40858 51402 61287 80922 122574 175331 265577 350662 418097 525993 531154 796731 836194 1051986 1254291 1593462 2508582 5435261 8887933 10870522 16305783 17775866 26663799 32611566 53327598 115543129 231086258 275525923 346629387 551051846 693258774 826577769 1653155538 3581836999 7163673998 10745510997 21491021994
- Sum of all divisors σ(n): 47857582080
- Sum of proper divisors (its aliquot sum) s(n): 26366560086
- 21491021994 is an abundant number, because the sum of its proper divisors (26366560086) is greater than itself. Its abundance is 4875538092
Bases of 21491021994
- Binary: 101000000001111011011111000101010102
- Hexadecimal: 0x500F6F8AA
- Base-36: 9VF76P6
Squares and roots of 21491021994
- 21491021994 squared (214910219942) is 461864026346591736036
- 21491021994 cubed (214910219943) is 9925929948451998466088318375784
-
The
square root of 21491021994 is 146598.1650430867 -
The
cube root of 21491021994 is 2780.2617800343
Scales and comparisons
How big is 21491021994?- 21,491,021,994 seconds is equal to 683 years, 18 weeks, 16 hours, 19 minutes, 54 seconds.
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To count from 1 to 21,491,021,994 would take you about one thousand, three hundred sixty-six years!
This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)
- A cube with a volume of 21491021994 cubic inches would be around 231.7 feet tall.
Recreational maths with 21491021994
- 21491021994 backwards is 49912019412
- The number of decimal digits it has is: 11
- The sum of 21491021994's digits is 42
- More coming soon!
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The information we have on file for 21491021994 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!
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