21165081672
21,165,081,672 is an even composite number composed of seven prime numbers multiplied together.
21165081672 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of two hundred fifty-six divisors.
Prime factorization of 21165081672:
23 × 3 × 7 × 61 × 83 × 149 × 167
(2 × 2 × 2 × 3 × 7 × 61 × 83 × 149 × 167)See below for interesting mathematical facts about the number 21165081672 from the Numbermatics database.
Names of 21165081672
- Cardinal: 21165081672 can be written as Twenty-one billion, one hundred sixty-five million, eighty-one thousand, six hundred seventy-two.
Scientific notation
- Scientific notation: 2.1165081672 × 1010
Factors of 21165081672
Divisors of 21165081672
- Number of divisors d(n): 256
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Complete list of divisors:
1 2 3 4 6 7 8 12 14 21 24 28 42 56 61 83 84 122 149 166 167 168 183 244 249 298 332 334 366 427 447 488 498 501 581 596 664 668 732 854 894 996 1002 1043 1162 1169 1192 1281 1336 1464 1708 1743 1788 1992 2004 2086 2324 2338 2562 3129 3416 3486 3507 3576 4008 4172 4648 4676 5063 5124 6258 6972 7014 8344 9089 9352 10126 10187 10248 12367 12516 13861 13944 14028 15189 18178 20252 20374 24734 24883 25032 27267 27722 28056 30378 30561 35441 36356 37101 40504 40748 41583 49468 49766 54534 55444 60756 61122 63623 70882 71309 72712 74202 74649 81496 83166 86569 97027 98936 99532 106323 109068 110888 121512 122244 127246 141764 142618 148404 149298 166332 173138 174181 190869 194054 199064 212646 213927 218136 244488 254492 259707 283528 285236 291081 296808 298596 332664 346276 348362 381738 388108 425292 427854 508984 519414 522543 570472 582162 597192 692552 696724 754387 763476 776216 845521 850584 855708 1038828 1045086 1164324 1393448 1508774 1517863 1526952 1691042 1711416 2065289 2077656 2090172 2263161 2328648 2536563 3017548 3035726 3382084 4130578 4180344 4526322 4553589 5073126 5280709 5918647 6035096 6071452 6195867 6764168 8261156 9052644 9107178 10146252 10561418 10625041 11837294 12142904 12391734 14457023 15842127 16522312 17755941 18105288 18214356 20292504 21122836 21250082 23674588 24783468 28914046 31684254 31875123 35511882 36428712 42245672 42500164 43371069 47349176 49566936 57828092 63368508 63750246 71023764 85000328 86742138 115656184 125982629 126737016 127500492 142047528 173484276 251965258 255000984 346968552 377947887 503930516 755895774 881878403 1007861032 1511791548 1763756806 2645635209 3023583096 3527513612 5291270418 7055027224 10582540836 21165081672
- Sum of all divisors σ(n): 62995968000
- Sum of proper divisors (its aliquot sum) s(n): 41830886328
- 21165081672 is an abundant number, because the sum of its proper divisors (41830886328) is greater than itself. Its abundance is 20665804656
Bases of 21165081672
- Binary: 100111011011000100110000100010010002
- Hexadecimal: 0x4ED898448
- Base-36: 9Q155JC
Squares and roots of 21165081672
- 21165081672 squared (211650816722) is 447960682182430315584
- 21165081672 cubed (211650816723) is 9481124424235972832784094376448
-
The
square root of 21165081672 is 145482.2383385683 -
The
cube root of 21165081672 is 2766.1346457595
Scales and comparisons
How big is 21165081672?- 21,165,081,672 seconds is equal to 672 years, 51 weeks, 1 day, 5 hours, 21 minutes, 12 seconds.
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To count from 1 to 21,165,081,672 would take you about one thousand, three hundred forty-five 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 21165081672 cubic inches would be around 230.5 feet tall.
Recreational maths with 21165081672
- 21165081672 backwards is 27618056112
- The number of decimal digits it has is: 11
- The sum of 21165081672's digits is 39
- More coming soon!
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