21721631841

Names of 21721631841

• Cardinal: 21721631841 can be written as Twenty-one billion, seven hundred twenty-one million, six hundred thirty-one thousand, eight hundred forty-one.

Scientific notation

• Scientific notation: 2.1721631841 × 10¹⁰

Factors of 21721631841

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 2479

Divisors of 21721631841

• Number of divisors d(n): 96
• Complete list of divisors:
  1 3 7 9 13 21 27 39 49 63 91 117 147 189 273 351 441 637 733 819 1323 1723 1911 2199 2457 5131 5169 5733 6597 9529 12061 15393 15507 17199 19791 22399 28587 35917 36183 46179 46521 66703 67197 84427 85761 107751 108549 138537 156793 200109 201591 253281 257283 323253 325647 466921 470379 600327 604773 759843 969759 1097551 1262959 1400763 1411137 1800981 2279529 3292653 3788877 4202289 4233411 8840713 9877959 11366631 12606867 16418467 26522139 29633877 34099893 49255401 61884991 79566417 114929269 147766203 185654973 238699251 344787807 443298609 556964919 804504883 1034363421 1670894757 2413514649 3103090263 7240543947 21721631841
• Sum of all divisors σ(n): 40392078720
• Sum of proper divisors (its aliquot sum) s(n): 18670446879
• 21721631841 is a deficient number, because the sum of its proper divisors (18670446879) is less than itself. Its deficiency is 3051184962

Bases of 21721631841

• Binary: 10100001110101101011100110001100001₂
• Hexadecimal: 0x50EB5CC61
• Base-36: 9Z8HYE9

Squares and roots of 21721631841

• 21721631841 squared (21721631841²) is 471829289835945049281
• 21721631841 cubed (21721631841³) is 10248902125616881648788483756321
• The square root of 21721631841 is 147382.6035901117
• The cube root of 21721631841 is 2790.1709722949

Scales and comparisons

• 21,721,631,841 seconds is equal to 690 years, 35 weeks, 2 days, 18 hours, 37 minutes, 21 seconds.
• To count from 1 to 21,721,631,841 would take you about one thousand, three hundred eighty-one 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 21721631841 cubic inches would be around 232.5 feet tall.

Recreational maths with 21721631841

• 21721631841 backwards is 14813612712
• The number of decimal digits it has is: 11
• The sum of 21721631841's digits is 36
• More coming soon!