21397531246

Names of 21397531246

• Cardinal: 21397531246 can be written as Twenty-one billion, three hundred ninety-seven million, five hundred thirty-one thousand, two hundred forty-six.

Scientific notation

• Scientific notation: 2.1397531246 × 10¹⁰

Factors of 21397531246

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 594

Divisors of 21397531246

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 7 13 14 26 41 67 82 91 127 134 182 254 287 337 469 533 574 674 871 889 938 1066 1651 1742 1778 2359 2747 3302 3731 4381 4718 5207 5494 6097 7462 8509 8762 10414 11557 12194 13817 17018 19229 22579 23114 27634 30667 35711 36449 38458 42799 45158 59563 61334 67691 71422 72898 85598 96719 110617 119126 135382 158053 179621 193438 221234 249977 293527 299593 316106 348869 359242 473837 499954 556387 587054 599186 697738 774319 925739 947674 1112774 1257347 1548638 1754759 1851478 2054689 2442083 2514694 2867533 3509518 3894709 4109378 4535297 4884166 5735066 6480173 7789418 9070594 12034607 12283313 12960346 20072731 22811867 24069214 24566626 31747079 37277929 40145462 45623734 63494158 74555858 84242249 117568853 159683069 168484498 235137706 260945503 319366138 521891006 822981971 1528395089 1645963942 3056790178 10698765623 21397531246
• Sum of all divisors σ(n): 41516826624
• Sum of proper divisors (its aliquot sum) s(n): 20119295378
• 21397531246 is a deficient number, because the sum of its proper divisors (20119295378) is less than itself. Its deficiency is 1278235868

Bases of 21397531246

• Binary: 10011111011011001000110101001101110₂
• Hexadecimal: 0x4FB646A6E
• Base-36: 9TVJCRY

Squares and roots of 21397531246

• 21397531246 squared (21397531246²) is 457854343423546312516
• 21397531246 cubed (21397531246³) is 9796952619522146834189190874936
• The square root of 21397531246 is 146278.9501124479
• The cube root of 21397531246 is 2776.2243330925

Scales and comparisons

• 21,397,531,246 seconds is equal to 680 years, 19 weeks, 3 days, 14 hours, 40 minutes, 46 seconds.
• To count from 1 to 21,397,531,246 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 21397531246 cubic inches would be around 231.4 feet tall.

Recreational maths with 21397531246

• 21397531246 backwards is 64213579312
• The number of decimal digits it has is: 11
• The sum of 21397531246's digits is 43
• More coming soon!