21655221744

Names of 21655221744

• Cardinal: 21655221744 can be written as Twenty-one billion, six hundred fifty-five million, two hundred twenty-one thousand, seven hundred forty-four.

Scientific notation

• Scientific notation: 2.1655221744 × 10¹⁰

Factors of 21655221744

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 198

Divisors of 21655221744

• Number of divisors d(n): 180
• Complete list of divisors:
  1 2 3 4 6 8 12 13 16 24 26 39 43 48 52 78 86 104 129 137 156 172 208 258 274 312 344 411 516 548 559 624 688 822 1032 1096 1118 1644 1677 1781 1849 2064 2192 2236 3288 3354 3562 3698 4472 5343 5547 5891 6576 6708 7124 7396 8944 10686 11094 11782 13416 14248 14792 17673 18769 21372 22188 23564 24037 26832 28496 29584 35346 37538 42744 44376 47128 48074 56307 70692 72111 75076 76583 85488 88752 94256 96148 112614 141384 144222 150152 153166 192296 225228 229749 243997 253313 282768 288444 300304 306332 384592 450456 459498 487994 506626 576888 612664 731991 759939 807067 900912 918996 975988 1013252 1153776 1225328 1463982 1519878 1614134 1837992 1951976 2026504 2421201 2927964 3039756 3228268 3293069 3675984 3903952 4053008 4842402 5855928 6079512 6456536 6586138 9684804 9879207 10491871 11711856 12159024 12913072 13172276 19369608 19758414 20983742 26344552 31475613 34703881 38739216 39516828 41967484 52689104 62951226 69407762 79033656 83934968 104111643 125902452 138815524 158067312 167869936 208223286 251804904 277631048 416446572 451150453 503609808 555262096 832893144 902300906 1353451359 1665786288 1804601812 2706902718 3609203624 5413805436 7218407248 10827610872 21655221744
• Sum of all divisors σ(n): 62133090936
• Sum of proper divisors (its aliquot sum) s(n): 40477869192
• 21655221744 is an abundant number, because the sum of its proper divisors (40477869192) is greater than itself. Its abundance is 18822647448

Bases of 21655221744

• Binary: 10100001010110000000111010111110000₂
• Hexadecimal: 0x50AC075F0
• Base-36: 9Y4YK1C

Squares and roots of 21655221744

• 21655221744 squared (21655221744²) is 468948628781810401536
• 21655221744 cubed (21655221744³) is 10155186542814844839027758198784
• The square root of 21655221744 is 147157.1328342599
• The cube root of 21655221744 is 2787.3245826699

Scales and comparisons

• 21,655,221,744 seconds is equal to 688 years, 29 weeks, 4 days, 3 hours, 22 minutes, 24 seconds.
• To count from 1 to 21,655,221,744 would take you about one thousand, three hundred seventy-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 21655221744 cubic inches would be around 232.3 feet tall.

Recreational maths with 21655221744

• 21655221744 backwards is 44712255612
• 21655221744 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21655221744's digits is 39
• More coming soon!