21721290642
21,721,290,642 is an even composite number composed of five prime numbers multiplied together.
21721290642 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of eighty divisors.
Prime factorization of 21721290642:
2 × 34 × 43 × 139 × 22433
(2 × 3 × 3 × 3 × 3 × 43 × 139 × 22433)See below for interesting mathematical facts about the number 21721290642 from the Numbermatics database.
Names of 21721290642
- Cardinal: 21721290642 can be written as Twenty-one billion, seven hundred twenty-one million, two hundred ninety thousand, six hundred forty-two.
Scientific notation
- Scientific notation: 2.1721290642 × 1010
Factors of 21721290642
Divisors of 21721290642
- Number of divisors d(n): 80
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Complete list of divisors:
1 2 3 6 9 18 27 43 54 81 86 129 139 162 258 278 387 417 774 834 1161 1251 2322 2502 3483 3753 5977 6966 7506 11259 11954 17931 22433 22518 35862 44866 53793 67299 107586 134598 161379 201897 322758 403794 484137 605691 964619 968274 1211382 1817073 1929238 2893857 3118187 3634146 5787714 6236374 8681571 9354561 17363142 18709122 26044713 28063683 52089426 56127366 78134139 84191049 134082041 156268278 168382098 252573147 268164082 402246123 505146294 804492246 1206738369 2413476738 3620215107 7240430214 10860645321 21721290642
- Sum of all divisors σ(n): 50164218720
- Sum of proper divisors (its aliquot sum) s(n): 28442928078
- 21721290642 is an abundant number, because the sum of its proper divisors (28442928078) is greater than itself. Its abundance is 6721637436
Bases of 21721290642
- Binary: 101000011101011000010010111100100102
- Hexadecimal: 0x50EB09792
- Base-36: 9Z8AN4I
Squares and roots of 21721290642
- 21721290642 squared (217212906422) is 471814467154236772164
- 21721290642 cubed (217212906423) is 10248419170157539569858179289288
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The
square root of 21721290642 is 147381.4460575009 -
The
cube root of 21721290642 is 2790.1563630715
Scales and comparisons
How big is 21721290642?- 21,721,290,642 seconds is equal to 690 years, 34 weeks, 5 days, 19 hours, 50 minutes, 42 seconds.
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To count from 1 to 21,721,290,642 would take you about one thousand, three hundred eighty-one 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 21721290642 cubic inches would be around 232.5 feet tall.
Recreational maths with 21721290642
- 21721290642 backwards is 24609212712
- The number of decimal digits it has is: 11
- The sum of 21721290642's digits is 36
- More coming soon!
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