21393137664

Names of 21393137664

• Cardinal: 21393137664 can be written as Twenty-one billion, three hundred ninety-three million, one hundred thirty-seven thousand, six hundred sixty-four.

Scientific notation

• Scientific notation: 2.1393137664 × 10¹⁰

Factors of 21393137664

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 18
• Sum of prime factors: 316

Divisors of 21393137664

• Number of divisors d(n): 168
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 27 32 36 48 54 64 72 96 108 128 144 192 216 256 288 311 384 432 512 576 622 768 864 933 1024 1152 1244 1536 1728 1866 2048 2304 2488 2799 3072 3456 3732 4096 4608 4976 5598 6144 6912 7464 8192 8397 9216 9952 11196 12288 13824 14928 16794 18432 19904 22392 24576 27648 29856 33588 36864 39808 44784 55296 59712 67176 73728 79616 89568 96721 110592 119424 134352 159232 179136 193442 221184 238848 268704 290163 318464 358272 386884 477696 537408 580326 636928 716544 773768 870489 955392 1074816 1160652 1273856 1433088 1547536 1740978 1910784 2149632 2321304 2547712 2611467 2866176 3095072 3481956 3821568 4299264 4642608 5222934 5732352 6190144 6963912 7643136 8598528 9285216 10445868 11464704 12380288 13927824 17197056 18570432 20891736 22929408 24760576 27855648 34394112 37140864 41783472 49521152 55711296 68788224 74281728 83566944 99042304 111422592 148563456 167133888 198084608 222845184 297126912 334267776 396169216 445690368 594253824 668535552 792338432 891380736 1188507648 1337071104 1782761472 2377015296 2674142208 3565522944 5348284416 7131045888 10696568832 21393137664
• Sum of all divisors σ(n): 63587665560
• Sum of proper divisors (its aliquot sum) s(n): 42194527896
• 21393137664 is an abundant number, because the sum of its proper divisors (42194527896) is greater than itself. Its abundance is 20801390232

Bases of 21393137664

• Binary: 10011111011001000010110000000000000₂
• Hexadecimal: 0x4FB216000
• Base-36: 9TSX6O0

Squares and roots of 21393137664

• 21393137664 squared (21393137664²) is 457666339110855376896
• 21393137664 cubed (21393137664³) is 9790918996777436434730733010944
• The square root of 21393137664 is 146263.9315210691
• The cube root of 21393137664 is 2776.0343048745

Scales and comparisons

• 21,393,137,664 seconds is equal to 680 years, 12 weeks, 1 day, 18 hours, 14 minutes, 24 seconds.
• To count from 1 to 21,393,137,664 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 21393137664 cubic inches would be around 231.3 feet tall.

Recreational maths with 21393137664

• 21393137664 backwards is 46673139312
• The number of decimal digits it has is: 11
• The sum of 21393137664's digits is 45
• More coming soon!