21389795856

Names of 21389795856

• Cardinal: 21389795856 can be written as Twenty-one billion, three hundred eighty-nine million, seven hundred ninety-five thousand, eight hundred fifty-six.

Scientific notation

• Scientific notation: 2.1389795856 × 10¹⁰

Factors of 21389795856

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 4133

Divisors of 21389795856

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 3 4 6 8 9 11 12 13 16 18 22 24 26 33 36 39 44 48 52 66 72 78 88 99 104 117 132 143 144 156 176 198 208 234 264 271 286 312 396 429 468 528 542 572 624 792 813 858 936 1084 1144 1287 1584 1626 1716 1872 2168 2288 2439 2574 2981 3252 3432 3523 3833 4336 4878 5148 5962 6504 6864 7046 7666 8943 9756 10296 10569 11499 11924 13008 14092 15332 17886 19512 20592 21138 22998 23848 26829 28184 30664 31707 34497 35772 38753 39024 42163 42276 45996 47696 49829 53658 56368 61328 63414 68994 71544 77506 84326 84552 91992 99658 107316 116259 126489 126828 137988 143088 149487 155012 168652 169104 183984 199316 214632 232518 252978 253656 275976 298974 310024 337304 348777 379467 398632 429264 448461 465036 505956 507312 548119 551952 597948 620048 674608 697554 758934 797264 896922 930072 1011912 1038743 1096238 1195896 1395108 1517868 1644357 1793844 1860144 2023824 2077486 2192476 2391792 2790216 3035736 3116229 3288714 3587688 4154972 4384952 4933071 5580432 6071472 6232458 6577428 7175376 8309944 8769904 9348687 9866142 11426173 12464916 13154856 13503659 16619888 18697374 19732284 22852346 24929832 26309712 27007318 34278519 37394748 39464568 40510977 45704692 49859664 54014636 68557038 74789496 78929136 81021954 91409384 102835557 108029272 121532931 137114076 148540249 149578992 162043908 182818768 205671114 216058544 243065862 274228152 297080498 324087816 411342228 445620747 486131724 548456304 594160996 648175632 822684456 891241494 972263448 1188321992 1336862241 1645368912 1782482988 1944526896 2376643984 2673724482 3564965976 5347448964 7129931952 10694897928 21389795856
• Sum of all divisors σ(n): 70604980992
• Sum of proper divisors (its aliquot sum) s(n): 49215185136
• 21389795856 is an abundant number, because the sum of its proper divisors (49215185136) is greater than itself. Its abundance is 27825389280

Bases of 21389795856

• Binary: 10011111010111011100110001000010000₂
• Hexadecimal: 0x4FAEE6210
• Base-36: 9TQXK40

Squares and roots of 21389795856

• 21389795856 squared (21389795856²) is 457523366761354772736
• 21389795856 cubed (21389795856³) is 9786331414375194458814314582016
• The square root of 21389795856 is 146252.5071785097
• The cube root of 21389795856 is 2775.8897498479

Scales and comparisons

• 21,389,795,856 seconds is equal to 680 years, 6 weeks, 5 days, 1 hour, 57 minutes, 36 seconds.
• To count from 1 to 21,389,795,856 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 21389795856 cubic inches would be around 231.3 feet tall.

Recreational maths with 21389795856

• 21389795856 backwards is 65859798312
• The number of decimal digits it has is: 11
• The sum of 21389795856's digits is 63
• More coming soon!