21006385456

Names of 21006385456

• Cardinal: 21006385456 can be written as Twenty-one billion, six million, three hundred eighty-five thousand, four hundred fifty-six.

Scientific notation

• Scientific notation: 2.1006385456 × 10¹⁰

Factors of 21006385456

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 389

Divisors of 21006385456

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 4 7 8 14 16 28 43 49 56 86 98 112 172 196 301 337 344 392 602 674 688 784 1204 1348 1849 2107 2359 2408 2696 3698 4214 4718 4816 5392 7396 8428 9436 12943 14491 14792 16513 16856 18872 25886 28982 29584 33026 33712 37744 51772 57964 66052 79507 90601 101437 103544 115928 132104 159014 181202 202874 207088 231856 264208 318028 362404 405748 556549 623113 636056 710059 724808 811496 1113098 1246226 1272112 1420118 1449616 1622992 2226196 2492452 2840236 3895843 4361791 4452392 4984904 5680472 7791686 8723582 8904784 9969808 11360944 15583372 17447164 26793859 30532537 31166744 34894328 53587718 61065074 62333488 69788656 107175436 122130148 187557013 214350872 244260296 375114026 428701744 488520592 750228052 1312899091 1500456104 2625798182 3000912208 5251596364 10503192728 21006385456
• Sum of all divisors σ(n): 48615824400
• Sum of proper divisors (its aliquot sum) s(n): 27609438944
• 21006385456 is an abundant number, because the sum of its proper divisors (27609438944) is greater than itself. Its abundance is 6603053488

Bases of 21006385456

• Binary: 10011100100000101000000000100110000₂
• Hexadecimal: 0x4E4140130
• Base-36: 9NENQR4

Squares and roots of 21006385456

• 21006385456 squared (21006385456²) is 441268229926048327936
• 21006385456 cubed (21006385456³) is 9269450527313405551507908898816
• The square root of 21006385456 is 144935.7977036729
• The cube root of 21006385456 is 2759.2037827881

Scales and comparisons

• 21,006,385,456 seconds is equal to 667 years, 48 weeks, 5 days, 11 hours, 4 minutes, 16 seconds.
• To count from 1 to 21,006,385,456 would take you about one thousand, three hundred thirty-five 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 21006385456 cubic inches would be around 229.9 feet tall.

Recreational maths with 21006385456

• 21006385456 backwards is 65458360012
• The number of decimal digits it has is: 11
• The sum of 21006385456's digits is 40
• More coming soon!