21387266730

Names of 21387266730

• Cardinal: 21387266730 can be written as Twenty-one billion, three hundred eighty-seven million, two hundred sixty-six thousand, seven hundred thirty.

Scientific notation

• Scientific notation: 2.138726673 × 10¹⁰

Factors of 21387266730

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 14065

Divisors of 21387266730

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 3 5 6 9 10 15 18 27 30 31 45 54 61 62 81 90 93 122 135 155 162 183 186 270 279 305 310 366 405 465 549 558 610 810 837 915 930 1098 1395 1647 1674 1830 1891 2511 2745 2790 3294 3782 4185 4941 5022 5490 5673 8235 8370 9455 9882 11346 12555 13963 16470 17019 18910 24705 25110 27926 28365 34038 41889 49410 51057 56730 69815 83778 85095 102114 125667 139630 153171 170190 209445 251334 255285 306342 377001 418890 432853 510570 628335 754002 765855 851743 865706 1131003 1256670 1298559 1531710 1703486 1885005 2164265 2262006 2555229 2597118 3770010 3895677 4258715 4328530 5110458 5655015 6492795 7665687 7791354 8517430 11310030 11687031 12776145 12985590 15331374 19478385 22997061 23374062 25552290 26404033 35061093 38328435 38956770 45994122 52808066 58435155 68991183 70122186 76656870 79212099 114985305 116870310 132020165 137982366 158424198 175305465 229970610 237636297 264040330 344955915 350610930 396060495 475272594 689911830 712908891 792120990 1188181485 1425817782 2138726673 2376362970 3564544455 4277453346 7129088910 10693633365 21387266730
• Sum of all divisors σ(n): 60340566528
• Sum of proper divisors (its aliquot sum) s(n): 38953299798
• 21387266730 is an abundant number, because the sum of its proper divisors (38953299798) is greater than itself. Its abundance is 17566033068

Bases of 21387266730

• Binary: 10011111010110001111100101010101010₂
• Hexadecimal: 0x4FAC7CAAA
• Base-36: 9TPFCMI

Squares and roots of 21387266730

• 21387266730 squared (21387266730²) is 457415178180164892900
• 21387266730 cubed (21387266730³) is 9782860422089662559834183217000
• The square root of 21387266730 is 146243.8604865175
• The cube root of 21387266730 is 2775.7803386173

Scales and comparisons

• 21,387,266,730 seconds is equal to 680 years, 2 weeks, 3 days, 19 hours, 25 minutes, 30 seconds.
• To count from 1 to 21,387,266,730 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 21387266730 cubic inches would be around 231.3 feet tall.

Recreational maths with 21387266730

• 21387266730 backwards is 03766278312
• 21387266730 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21387266730's digits is 45
• More coming soon!