21918372943118440

Names of 21918372943118440

• Cardinal: 21918372943118440 can be written as Twenty-one quadrillion, nine hundred eighteen trillion, three hundred seventy-two billion, nine hundred forty-three million, one hundred eighteen thousand, four hundred forty.

Scientific notation

• Scientific notation: 2.191837294311844 × 10¹⁶

Factors of 21918372943118440

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 17143

Divisors of 21918372943118440

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 4 5 8 10 20 37 40 74 148 185 296 370 740 1369 1480 2738 5476 6845 10952 13690 17099 27380 34198 50653 54760 68396 85495 101306 136792 170990 202612 253265 341980 405224 506530 632663 683960 1013060 1265326 1874161 2026120 2530652 3163315 3748322 5061304 6326630 7496644 9370805 12653260 14993288 18741610 23408531 25306520 37483220 46817062 74966440 93634124 117042655 187268248 234085310 292375801 468170620 584751602 866115647 936341240 1169503204 1461879005 1732231294 2339006408 2923758010 3464462588 4330578235 5847516020 6928925176 8661156470 10817904637 11695032040 17322312940 21635809274 32046278939 34644625880 43271618548 54089523185 64092557878 86543237096 108179046370 128185115756 160231394695 216358092740 256370231512 320462789390 400262471569 432716185480 640925578780 800524943138 1281851157560 1601049886276 2001312357845 3202099772552 4002624715690 8005249431380 14809711448053 16010498862760 29619422896106 59238845792212 74048557240265 118477691584424 148097114480530 296194228961060 547959323577961 592388457922120 1095918647155922 2191837294311844 2739796617889805 4383674588623688 5479593235779610 10959186471559220 21918372943118440
• Sum of all divisors σ(n): 50689201154140890
• Sum of proper divisors (its aliquot sum) s(n): 28770828211022450
• 21918372943118440 is an abundant number, because the sum of its proper divisors (28770828211022450) is greater than itself. Its abundance is 6852455267904010

Bases of 21918372943118440

• Binary: 1001101110111101010010011100001010101000100000001101000₂
• Hexadecimal: 0x4DDEA4E1544068
• Base-36: 5ZTEXIUPOX4

Squares and roots of 21918372943118440

• 21918372943118440 squared (21918372943118440²) is 480415072473626505431751868033600
• 21918372943118440 cubed (21918372943118440³) is 10529916725972219638926729000700701546134699584000
• The square root of 21918372943118440 is 148048549.2773179457
• The cube root of 21918372943118440 is 279856.9547534595

Scales and comparisons

• 21,918,372,943,118,440 seconds is equal to 696,936,461 years, 31 weeks, 5 days, 20 hours, 40 seconds.
• To count from 1 to 21,918,372,943,118,440 would take you about two billion, ninety million, eight hundred nine thousand, three hundred eighty-four 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 21918372943118440 cubic inches would be around 23321.4 feet tall.

Recreational maths with 21918372943118440

• 21918372943118440 backwards is 04481134927381912
• The number of decimal digits it has is: 17
• The sum of 21918372943118440's digits is 67
• More coming soon!