21397251210

Names of 21397251210

• Cardinal: 21397251210 can be written as Twenty-one billion, three hundred ninety-seven million, two hundred fifty-one thousand, two hundred ten.

Scientific notation

• Scientific notation: 2.139725121 × 10¹⁰

Factors of 21397251210

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 125

Divisors of 21397251210

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 5 6 10 15 23 30 31 46 61 62 69 93 115 122 138 155 183 186 230 305 310 345 366 465 529 610 690 713 915 930 961 1058 1403 1426 1587 1830 1891 1922 2139 2645 2806 2883 3174 3565 3782 4209 4278 4805 5290 5673 5766 7015 7130 7935 8418 9455 9610 10695 11346 12167 14030 14415 15870 16399 18910 21045 21390 22103 24334 28365 28830 32269 32798 36501 42090 43493 44206 49197 56730 58621 60835 64538 66309 73002 81995 86986 96807 98394 110515 117242 121670 130479 132618 161345 163990 175863 182505 193614 217465 221030 245985 260958 293105 322690 331545 351726 365010 377177 434930 484035 491970 508369 586210 652395 663090 742187 754354 879315 968070 1000339 1016738 1131531 1304790 1348283 1484374 1525107 1758630 1885885 2000678 2226561 2263062 2541845 2696566 3001017 3050214 3710935 3771770 4044849 4453122 5001695 5083690 5657655 6002034 6741415 7421870 7625535 8089698 10003390 11132805 11315310 11692487 13482830 15005085 15251070 20224245 22265610 23007797 23384974 30010170 31010509 35077461 40448490 46015594 58462435 62021018 69023391 70154922 93031527 115038985 116924870 138046782 155052545 175387305 186063054 230077970 310105090 345116955 350774610 465157635 690233910 713241707 930315270 1426483414 2139725121 3566208535 4279450242 7132417070 10698625605 21397251210
• Sum of all divisors σ(n): 56384605440
• Sum of proper divisors (its aliquot sum) s(n): 34987354230
• 21397251210 is an abundant number, because the sum of its proper divisors (34987354230) is greater than itself. Its abundance is 13590103020

Bases of 21397251210

• Binary: 10011111011011000000010010010001010₂
• Hexadecimal: 0x4FB60248A
• Base-36: 9TVDCP6

Squares and roots of 21397251210

• 21397251210 squared (21397251210²) is 457842359343846464100
• 21397251210 cubed (21397251210³) is 9796567977459373560017946561000
• The square root of 21397251210 is 146277.9929107587
• The cube root of 21397251210 is 2776.2122219421

Scales and comparisons

• 21,397,251,210 seconds is equal to 680 years, 19 weeks, 8 hours, 53 minutes, 30 seconds.
• To count from 1 to 21,397,251,210 would take you about one thousand, three hundred sixty 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 21397251210 cubic inches would be around 231.4 feet tall.

Recreational maths with 21397251210

• 21397251210 backwards is 01215279312
• The number of decimal digits it has is: 11
• The sum of 21397251210's digits is 33
• More coming soon!