21031001537

Names of 21031001537

• Cardinal: 21031001537 can be written as Twenty-one billion, thirty-one million, one thousand, five hundred thirty-seven.

Scientific notation

• Scientific notation: 2.1031001537 × 10¹⁰

Factors of 21031001537

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 472

Divisors of 21031001537

• Number of divisors d(n): 96
• Complete list of divisors:
  1 7 13 41 43 49 61 91 287 301 307 427 533 559 637 793 1763 2009 2107 2149 2501 2623 2989 3731 3913 3991 5551 12341 12587 13201 15043 17507 18361 18727 22919 26117 27391 27937 32513 34099 38857 86387 88109 92407 107543 122549 128527 131089 160433 163631 171613 195559 227591 238693 243451 541241 616763 646849 752801 767807 805261 917623 1123031 1145417 1201291 1398059 1593137 1670851 1704157 3788687 5269607 5374649 5636827 7036133 8017919 8409037 9786413 9981491 10468393 11929099 26520809 33015701 37622543 39457789 49252931 68504891 69870437 73278751 231109907 344770517 429204113 489093059 512951257 1617769349 3004428791 21031001537
• Sum of all divisors σ(n): 28160947584
• Sum of proper divisors (its aliquot sum) s(n): 7129946047
• 21031001537 is a deficient number, because the sum of its proper divisors (7129946047) is less than itself. Its deficiency is 13901055490

Bases of 21031001537

• Binary: 10011100101100010111001110111000001₂
• Hexadecimal: 0x4E58B9DC1
• Base-36: 9NTBCN5

Squares and roots of 21031001537

• 21031001537 squared (21031001537²) is 442303025649296362369
• 21031001537 cubed (21031001537³) is 9302075612250102219950947961153
• The square root of 21031001537 is 145020.6934785515
• The cube root of 21031001537 is 2760.2811420273

Scales and comparisons

• 21,031,001,537 seconds is equal to 668 years, 37 weeks, 3 days, 8 hours, 52 minutes, 17 seconds.
• To count from 1 to 21,031,001,537 would take you about one thousand, three hundred thirty-seven 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 21031001537 cubic inches would be around 230 feet tall.

Recreational maths with 21031001537

• 21031001537 backwards is 73510013012
• The number of decimal digits it has is: 11
• The sum of 21031001537's digits is 23
• More coming soon!