21491188920
21,491,188,920 is an even composite number composed of six prime numbers multiplied together.
21491188920 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of three hundred twenty divisors.
Prime factorization of 21491188920:
23 × 34 × 5 × 29 × 127 × 1801
(2 × 2 × 2 × 3 × 3 × 3 × 3 × 5 × 29 × 127 × 1801)See below for interesting mathematical facts about the number 21491188920 from the Numbermatics database.
Names of 21491188920
- Cardinal: 21491188920 can be written as Twenty-one billion, four hundred ninety-one million, one hundred eighty-eight thousand, nine hundred twenty.
Scientific notation
- Scientific notation: 2.149118892 × 1010
Factors of 21491188920
Divisors of 21491188920
- Number of divisors d(n): 320
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Complete list of divisors:
1 2 3 4 5 6 8 9 10 12 15 18 20 24 27 29 30 36 40 45 54 58 60 72 81 87 90 108 116 120 127 135 145 162 174 180 216 232 254 261 270 290 324 348 360 381 405 435 508 522 540 580 635 648 696 762 783 810 870 1016 1044 1080 1143 1160 1270 1305 1524 1566 1620 1740 1801 1905 2088 2286 2349 2540 2610 3048 3132 3240 3429 3480 3602 3683 3810 3915 4572 4698 5080 5220 5403 5715 6264 6858 7204 7366 7620 7830 9005 9144 9396 10287 10440 10806 11049 11430 11745 13716 14408 14732 15240 15660 16209 17145 18010 18415 18792 20574 21612 22098 22860 23490 27015 27432 29464 31320 32418 33147 34290 36020 36830 41148 43224 44196 45720 46980 48627 51435 52229 54030 55245 64836 66294 68580 72040 73660 81045 82296 88392 93960 97254 99441 102870 104458 108060 110490 129672 132588 137160 145881 147320 156687 162090 165735 194508 198882 205740 208916 216120 220980 228727 243135 261145 265176 291762 298323 313374 324180 331470 389016 397764 411480 417832 441960 457454 470061 486270 497205 522290 583524 596646 626748 648360 662940 686181 729405 783435 795528 914908 940122 972540 994410 1044580 1143635 1167048 1193292 1253496 1325880 1372362 1410183 1458810 1491615 1566870 1829816 1880244 1945080 1988820 2058543 2089160 2287270 2350305 2386584 2744724 2820366 2917620 2983230 3133740 3430905 3760488 3977640 4117086 4230549 4574540 4700610 5489448 5640732 5835240 5966460 6175629 6267480 6633083 6861810 7050915 8234172 8461098 9149080 9401220 10292715 11281464 11932920 12351258 13266166 13723620 14101830 16468344 16922196 18526887 18802440 19899249 20585430 21152745 24702516 26532332 27447240 28203660 30878145 33165415 33844392 37053774 39798498 41170860 42305490 49405032 53064664 56407320 59697747 61756290 66330830 74107548 79596996 82341720 84610980 92634435 99496245 119395494 123512580 132661660 148215096 159193992 169221960 179093241 185268870 198992490 238790988 247025160 265323320 298488735 358186482 370537740 397984980 477581976 537279723 596977470 716372964 741075480 795969960 895466205 1074559446 1193954940 1432745928 1790932410 2149118892 2387909880 2686398615 3581864820 4298237784 5372797230 7163729640 10745594460 21491188920
- Sum of all divisors σ(n): 75355315200
- Sum of proper divisors (its aliquot sum) s(n): 53864126280
- 21491188920 is an abundant number, because the sum of its proper divisors (53864126280) is greater than itself. Its abundance is 32372937360
Bases of 21491188920
- Binary: 101000000001111100110000100101110002
- Hexadecimal: 0x500F984B8
- Base-36: 9VFARI0
Squares and roots of 21491188920
- 21491188920 squared (214911889202) is 461871201195130766400
- 21491188920 cubed (214911889203) is 9926161241591885084806788288000
-
The
square root of 21491188920 is 146598.7343738001 -
The
cube root of 21491188920 is 2780.2689783391
Scales and comparisons
How big is 21491188920?- 21,491,188,920 seconds is equal to 683 years, 18 weeks, 2 days, 14 hours, 42 minutes.
-
To count from 1 to 21,491,188,920 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 21491188920 cubic inches would be around 231.7 feet tall.
Recreational maths with 21491188920
- 21491188920 backwards is 02988119412
- 21491188920 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 21491188920's digits is 45
- More coming soon!
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