21312968913

Names of 21312968913

• Cardinal: 21312968913 can be written as Twenty-one billion, three hundred twelve million, nine hundred sixty-eight thousand, nine hundred thirteen.

Scientific notation

• Scientific notation: 2.1312968913 × 10¹⁰

Factors of 21312968913

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 161

Divisors of 21312968913

• Number of divisors d(n): 66
• Complete list of divisors:
  1 3 9 27 61 81 97 183 243 291 549 729 873 1647 2187 2619 3721 4941 5917 6561 7857 11163 14823 17751 19683 23571 33489 44469 53253 59049 70713 100467 133407 159759 212139 301401 360937 400221 479277 636417 904203 1082811 1200663 1437831 1909251 2712609 3248433 3601989 4313493 5727753 8137827 9745299 12940479 24413481 29235897 38821437 73240443 87707691 116464311 219721329 263123073 349392933 789369219 2368107657 7104322971 21312968913
• Sum of all divisors σ(n): 32837022582
• Sum of proper divisors (its aliquot sum) s(n): 11524053669
• 21312968913 is a deficient number, because the sum of its proper divisors (11524053669) is less than itself. Its deficiency is 9788915244

Bases of 21312968913

• Binary: 10011110110010110100001100011010001₂
• Hexadecimal: 0x4F65A18D1
• Base-36: 9SH6W29

Squares and roots of 21312968913

• 21312968913 squared (21312968913²) is 454242643886504401569
• 21312968913 cubed (21312968913³) is 9681259348111997810877765424497
• The square root of 21312968913 is 145989.6191960235
• The cube root of 21312968913 is 2772.5623226721

Scales and comparisons

• 21,312,968,913 seconds is equal to 677 years, 35 weeks, 4 days, 21 hours, 8 minutes, 33 seconds.
• To count from 1 to 21,312,968,913 would take you about one thousand, three hundred fifty-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 21312968913 cubic inches would be around 231 feet tall.

Recreational maths with 21312968913

• 21312968913 backwards is 31986921312
• The number of decimal digits it has is: 11
• The sum of 21312968913's digits is 45
• More coming soon!