21492793681018

Names of 21492793681018

• Cardinal: 21492793681018 can be written as Twenty-one trillion, four hundred ninety-two billion, seven hundred ninety-three million, six hundred eighty-one thousand and eighteen.

Scientific notation

• Scientific notation: 2.1492793681018 × 10¹³

Factors of 21492793681018

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 161481

Divisors of 21492793681018

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 11 19 22 38 71 121 142 209 242 409 418 781 818 1349 1562 2299 2698 4499 4598 7771 8591 8998 14839 15542 17182 29039 29678 49489 58078 85481 98978 160969 163229 170962 319429 321938 326458 551741 638858 940291 1103482 1770659 1880582 3058411 3513719 3541318 6069151 6116822 7027438 11428799 12138302 19477249 22857598 33642521 38954498 65836321 66760661 67285042 125716789 131672642 133521322 217147181 251433578 370067731 434294362 724199531 740135462 1250890099 1382884679 1448399062 2388618991 2501780198 2765769358 4674378791 4777237982 7966194841 9348757582 13759791089 15932389682 26274808901 27519582178 51418166701 52549617802 88813197029 102836333402 151357701979 177626394058 302715403958 565599833711 976945167319 1131199667422 1953890334638 10746396840509 21492793681018
• Sum of all divisors σ(n): 37919638512000
• Sum of proper divisors (its aliquot sum) s(n): 16426844830982
• 21492793681018 is a deficient number, because the sum of its proper divisors (16426844830982) is less than itself. Its deficiency is 5065948850036

Bases of 21492793681018

• Binary: 100111000110000101110010101010010010001111010₂
• Hexadecimal: 0x138C2E55247A
• Base-36: 7M9NIFHIY

Squares and roots of 21492793681018

• 21492793681018 squared (21492793681018²) is 461940180214807270333516324
• 21492793681018 cubed (21492793681018³) is 9928384986329125845700924941843551937832
• The square root of 21492793681018 is 4636032.1052617831
• The cube root of 21492793681018 is 27803.3817811275

Scales and comparisons

• 21,492,793,681,018 seconds is equal to 683,404 years, 18 weeks, 4 days, 2 hours, 56 minutes, 58 seconds.
• To count from 1 to 21,492,793,681,018 would take you about one million, seven hundred eight thousand, five hundred ten 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 21492793681018 cubic inches would be around 2316.9 feet tall.

Recreational maths with 21492793681018

• 21492793681018 backwards is 81018639729412
• The number of decimal digits it has is: 14
• The sum of 21492793681018's digits is 61
• More coming soon!