21400645497

Names of 21400645497

• Cardinal: 21400645497 can be written as Twenty-one billion, four hundred million, six hundred forty-five thousand, four hundred ninety-seven.

Scientific notation

• Scientific notation: 2.1400645497 × 10¹⁰

Factors of 21400645497

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 891

Divisors of 21400645497

• Number of divisors d(n): 128
• Complete list of divisors:
  1 3 7 11 19 21 29 33 57 77 87 133 203 209 231 319 383 399 439 551 609 627 957 1149 1317 1463 1653 2233 2681 3073 3857 4213 4389 4829 6061 6699 7277 8043 8341 9219 11107 11571 12639 12731 14487 18183 21831 25023 29491 33321 33803 38193 42427 50939 58387 77749 80047 88473 89117 91751 101409 122177 127281 140041 152817 168137 175161 211033 233247 240141 241889 267351 275253 366531 420123 504411 560329 633099 642257 725667 855239 980287 1176959 1477231 1680987 1693223 1849507 1926771 2321363 2565717 2660779 2940861 3194603 3530877 4431693 4875973 5079669 5548521 6964089 7982337 9583809 12946549 14627919 16249541 18625453 22362221 34131811 35140633 38839647 48748623 53635703 55876359 67086663 92643487 102395433 105421899 160907109 245984431 277930461 375449921 648504409 737953293 1019078357 1126349763 1945513227 3057235071 7133548499 21400645497
• Sum of all divisors σ(n): 38928384000
• Sum of proper divisors (its aliquot sum) s(n): 17527738503
• 21400645497 is a deficient number, because the sum of its proper divisors (17527738503) is less than itself. Its deficiency is 3872906994

Bases of 21400645497

• Binary: 10011111011100100111110111101111001₂
• Hexadecimal: 0x4FB93EF79
• Base-36: 9TXE3QX

Squares and roots of 21400645497

• 21400645497 squared (21400645497²) is 457987627688266377009
• 21400645497 cubed (21400645497³) is 9801230862168610360874160178473
• The square root of 21400645497 is 146289.5946299667
• The cube root of 21400645497 is 2776.3590128037

Scales and comparisons

• 21,400,645,497 seconds is equal to 680 years, 24 weeks, 4 days, 15 hours, 44 minutes, 57 seconds.
• To count from 1 to 21,400,645,497 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 21400645497 cubic inches would be around 231.4 feet tall.

Recreational maths with 21400645497

• 21400645497 backwards is 79454600412
• The number of decimal digits it has is: 11
• The sum of 21400645497's digits is 42
• More coming soon!