21381751272

Names of 21381751272

• Cardinal: 21381751272 can be written as Twenty-one billion, three hundred eighty-one million, seven hundred fifty-one thousand, two hundred seventy-two.

Scientific notation

• Scientific notation: 2.1381751272 × 10¹⁰

Factors of 21381751272

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 2252

Divisors of 21381751272

• Number of divisors d(n): 256
• Complete list of divisors:
  1 2 3 4 6 7 8 12 14 21 24 28 29 31 42 56 58 62 67 84 87 93 116 124 134 168 174 186 201 203 217 232 248 268 348 372 402 406 434 469 536 609 651 696 744 804 812 868 899 938 1218 1302 1407 1608 1624 1736 1798 1876 1943 2077 2113 2436 2604 2697 2814 3596 3752 3886 4154 4226 4872 5208 5394 5628 5829 6231 6293 6339 7192 7772 8308 8452 10788 11256 11658 12462 12586 12678 13601 14539 14791 15544 16616 16904 18879 21576 23316 24924 25172 25356 27202 29078 29582 37758 40803 43617 44373 46632 49848 50344 50712 54404 58156 59164 60233 61277 65503 75516 81606 87234 88746 108808 116312 118328 120466 122554 131006 141571 151032 163212 174468 177492 180699 183831 196509 240932 245108 262012 283142 326424 348936 354984 361398 367662 393018 421631 424713 428939 458521 481864 490216 524024 566284 722796 735324 786036 843262 849426 857878 917042 990997 1132568 1264893 1286817 1375563 1445592 1470648 1572072 1686524 1698852 1715756 1834084 1899587 1981994 2529786 2573634 2751126 2972991 3373048 3397704 3431512 3668168 3799174 3963988 4105559 4388701 5059572 5147268 5502252 5698761 5945982 7598348 7927976 8211118 8777402 10119144 10294536 11004504 11397522 11891964 12316677 13166103 13297109 15196696 16422236 17554804 22795044 23783928 24633354 26332206 26594218 28738913 30720907 32844472 35109608 39891327 45590088 49266708 52664412 53188436 57477826 61441814 79782654 86216739 92162721 98533416 105328824 106376872 114955652 122883628 127272329 159565308 172433478 184325442 229911304 245767256 254544658 319130616 344866956 368650884 381816987 509089316 689733912 737301768 763633974 890906303 1018178632 1527267948 1781812606 2672718909 3054535896 3563625212 5345437818 7127250424 10690875636 21381751272
• Sum of all divisors σ(n): 66240921600
• Sum of proper divisors (its aliquot sum) s(n): 44859170328
• 21381751272 is an abundant number, because the sum of its proper divisors (44859170328) is greater than itself. Its abundance is 23477419056

Bases of 21381751272

• Binary: 10011111010011100111010000111101000₂
• Hexadecimal: 0x4FA73A1E8
• Base-36: 9TM54VC

Squares and roots of 21381751272

• 21381751272 squared (21381751272²) is 457179287457673617984
• 21381751272 cubed (21381751272³) is 9775293811130166527490234075648
• The square root of 21381751272 is 146225.0022123439
• The cube root of 21381751272 is 2775.5417072813

Scales and comparisons

• 21,381,751,272 seconds is equal to 679 years, 45 weeks, 2 days, 23 hours, 21 minutes, 12 seconds.
• To count from 1 to 21,381,751,272 would take you about one thousand, three hundred fifty-nine 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 21381751272 cubic inches would be around 231.3 feet tall.

Recreational maths with 21381751272

• 21381751272 backwards is 27215718312
• The number of decimal digits it has is: 11
• The sum of 21381751272's digits is 39
• More coming soon!