21491401764

Names of 21491401764

• Cardinal: 21491401764 can be written as Twenty-one billion, four hundred ninety-one million, four hundred one thousand, seven hundred sixty-four.

Scientific notation

• Scientific notation: 2.1491401764 × 10¹⁰

Factors of 21491401764

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 392

Divisors of 21491401764

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 6 7 12 14 21 28 42 49 84 98 147 151 196 229 294 302 343 453 458 588 604 686 687 906 916 1029 1057 1372 1374 1603 1812 2058 2114 2748 3171 3206 4116 4228 4809 6342 6412 7399 9618 11221 12684 14798 19236 22197 22442 22801 29596 33663 34579 44394 44884 45602 51793 67326 68403 69158 78547 88788 91204 103586 103737 134652 136806 138316 155379 157094 159607 207172 207474 235641 242053 273612 310758 314188 319214 414948 471282 478821 484106 621516 638428 726159 942564 957642 968212 1117249 1452318 1694371 1915284 2234498 2904636 3351747 3388742 4468996 5083113 5221429 6703494 6777484 7820743 10166226 10442858 11860597 13406988 15641486 15664287 20332452 20885716 23462229 23721194 31282972 31328574 35581791 36550003 46924458 47442388 62657148 71163582 73100006 93848916 109650009 142327164 146200012 219300018 255850021 438600036 511700042 767550063 1023400084 1535100126 1790950147 3070200252 3581900294 5372850441 7163800588 10745700882 21491401764
• Sum of all divisors σ(n): 59126928000
• Sum of proper divisors (its aliquot sum) s(n): 37635526236
• 21491401764 is an abundant number, because the sum of its proper divisors (37635526236) is greater than itself. Its abundance is 16144124472

Bases of 21491401764

• Binary: 10100000000111111001100010000100100₂
• Hexadecimal: 0x500FCC424
• Base-36: 9VFFBQC

Squares and roots of 21491401764

• 21491401764 squared (21491401764²) is 461880349781662311696
• 21491401764 cubed (21491401764³) is 9926456164054554420435732231744
• The square root of 21491401764 is 146599.4603127855
• The cube root of 21491401764 is 2780.2781566993

Scales and comparisons

• 21,491,401,764 seconds is equal to 683 years, 18 weeks, 5 days, 1 hour, 49 minutes, 24 seconds.
• To count from 1 to 21,491,401,764 would take you about one thousand, three hundred sixty-six 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 21491401764 cubic inches would be around 231.7 feet tall.

Recreational maths with 21491401764

• 21491401764 backwards is 46710419412
• The number of decimal digits it has is: 11
• The sum of 21491401764's digits is 39
• More coming soon!