21493905664

Names of 21493905664

• Cardinal: 21493905664 can be written as Twenty-one billion, four hundred ninety-three million, nine hundred five thousand, six hundred sixty-four.

Scientific notation

• Scientific notation: 2.1493905664 × 10¹⁰

Factors of 21493905664

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 37

Divisors of 21493905664

• Number of divisors d(n): 405
• Complete list of divisors:
  1 2 4 7 8 11 14 16 17 22 28 32 34 44 49 56 64 68 77 88 98 112 119 121 128 136 154 176 187 196 224 238 242 256 272 289 308 343 352 374 392 448 476 484 539 544 578 616 686 704 748 784 833 847 896 952 968 1078 1088 1156 1232 1309 1372 1408 1496 1568 1666 1694 1792 1904 1936 2023 2057 2156 2176 2312 2401 2464 2618 2744 2816 2992 3136 3179 3332 3388 3773 3808 3872 4046 4114 4312 4352 4624 4802 4928 5236 5488 5831 5929 5984 6272 6358 6664 6776 7546 7616 7744 8092 8228 8624 9163 9248 9604 9856 10472 10976 11662 11858 11968 12544 12716 13328 13552 14161 14399 15092 15232 15488 16184 16456 17248 18326 18496 19208 19712 20944 21952 22253 23324 23716 23936 25432 26411 26656 27104 28322 28798 30184 30464 30976 32368 32912 34496 34969 36652 36992 38416 40817 41503 41888 43904 44506 46648 47432 47872 50864 52822 53312 54208 56644 57596 60368 64141 64736 65824 68992 69938 73304 73984 76832 81634 83006 83776 87808 89012 93296 94864 99127 100793 101728 105644 106624 108416 113288 115192 120736 128282 129472 131648 137984 139876 146608 153664 155771 163268 166012 167552 178024 186592 189728 198254 201586 203456 211288 213248 216832 226576 230384 241472 244783 256564 258944 263296 279752 290521 293216 307328 311542 326536 332024 335104 356048 373184 379456 396508 403172 406912 422576 448987 453152 460768 482944 489566 513128 517888 526592 559504 581042 586432 614656 623084 653072 664048 693889 705551 712096 746368 758912 793016 806344 813824 845152 897974 906304 921536 965888 979132 1026256 1090397 1119008 1162084 1172864 1246168 1306144 1328096 1387778 1411102 1424192 1492736 1517824 1586032 1612688 1690304 1713481 1795948 1812608 1843072 1958264 2052512 2180794 2238016 2324168 2345728 2492336 2612288 2656192 2775556 2822204 2848384 3172064 3225376 3380608 3426962 3591896 3625216 3686144 3916528 4105024 4361588 4476032 4648336 4938857 4984672 5224576 5312384 5551112 5644408 5696768 6344128 6450752 6761216 6853924 7183792 7632779 7833056 8210048 8723176 8952064 9296672 9877714 9969344 10449152 10624768 11102224 11288816 11994367 12688256 12901504 13707848 14367584 15265558 15666112 16420096 17446352 18593344 19755428 19938688 22204448 22577632 23988734 25376512 25803008 27415696 28735168 30531116 31332224 34892704 37186688 39510856 39877376 44408896 45155264 47977468 54831392 57470336 61062232 62664448 69785408 74373376 79021712 83960569 88817792 90310528 95954936 109662784 114940672 122124464 139570816 158043424 167921138 177635584 180621056 191909872 219325568 244248928 279141632 316086848 335842276 383819744 438651136 488497856 632173696 671684552 767639488 976995712 1264347392 1343369104 1535278976 1953991424 2686738208 3070557952 5373476416 10746952832 21493905664
• Sum of all divisors σ(n): 58441859441
• Sum of proper divisors (its aliquot sum) s(n): 36947953777
• 21493905664 is an abundant number, because the sum of its proper divisors (36947953777) is greater than itself. Its abundance is 15454048113

Bases of 21493905664

• Binary: 10100000001001000101111100100000000₂
• Hexadecimal: 0x50122F900
• Base-36: 9VGWZR4

Squares and roots of 21493905664

• 21493905664 squared (21493905664²) is 461987980692931280896
• 21493905664 cubed (21493905664³) is 9929926074915718303213309394944
• 21493905664 is a perfect square number. Its square root is 146608
• The cube root of 21493905664 is 2780.3861265161

Scales and comparisons

• 21,493,905,664 seconds is equal to 683 years, 22 weeks, 6 days, 1 hour, 21 minutes, 4 seconds.
• To count from 1 to 21,493,905,664 would take you about one thousand, three hundred sixty-six 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 21493905664 cubic inches would be around 231.7 feet tall.

Recreational maths with 21493905664

• 21493905664 backwards is 46650939412
• 21493905664 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21493905664's digits is 49
• More coming soon!