21231282709728

Names of 21231282709728

• Cardinal: 21231282709728 can be written as Twenty-one trillion, two hundred thirty-one billion, two hundred eighty-two million, seven hundred nine thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1231282709728 × 10¹³

Factors of 21231282709728

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 6236

Divisors of 21231282709728

• Number of divisors d(n): 432
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 13 14 16 18 21 24 26 27 28 32 36 39 42 48 49 52 54 56 63 72 78 84 91 96 98 104 108 112 117 126 144 147 156 168 182 189 196 208 216 224 234 252 273 288 294 312 336 351 364 378 392 416 432 441 468 504 546 588 624 637 672 702 728 756 784 819 864 882 936 1008 1092 1176 1248 1274 1323 1404 1456 1512 1568 1638 1764 1872 1911 2016 2184 2352 2457 2548 2646 2808 2912 3024 3276 3528 3744 3822 4368 4704 4914 5096 5292 5616 5733 6048 6211 6552 7056 7644 8736 9828 10192 10584 11232 11466 12422 13104 14112 15288 17199 18633 19656 20384 21168 22932 24844 26208 30576 34398 37266 39312 42336 43477 45864 49688 55899 61152 68796 74532 78624 80743 86954 91728 99376 111798 130431 137592 149064 161486 167697 173908 183456 198752 223596 242229 260862 275184 298128 304339 322972 335394 347816 391293 447192 484458 521724 550368 565201 596256 608678 645944 670788 695632 726687 782586 894384 913017 968916 1043448 1130402 1173879 1217356 1291888 1341576 1391264 1453374 1565172 1695603 1788768 1826034 1937832 2086896 2180061 2260804 2347758 2434712 2583776 2683152 2739051 2906748 3130344 3391206 3652068 3875664 3956407 4173792 4360122 4521608 4695516 4869424 5086809 5366304 5478102 5813496 6260688 6782412 7304136 7751328 7912814 8217153 8720244 9043216 9391032 9738848 10173618 10956204 11626992 11869221 12521376 13564824 14608272 15260427 15825628 16434306 17440488 18086432 18782064 20347236 21912408 23253984 23738442 27129648 29216544 30520854 31651256 32868612 34880976 35607663 37564128 38576521 40694472 43824816 47476884 54259296 61041708 63302512 65737224 69761952 71215326 77153042 81388944 87649632 94953768 106822989 115729563 122083416 126605024 131474448 142430652 154306084 162777888 189907536 213645978 231459126 244166832 262948896 270035647 284861304 308612168 347188689 379815072 427291956 462918252 488333664 501494773 540071294 569722608 617224336 694377378 810106941 854583912 925836504 1002989546 1041566067 1080142588 1139445216 1234448672 1388754756 1504484319 1620213882 1709167824 1851673008 1890249529 2005979092 2083132134 2160285176 2430320823 2777509512 3008968638 3240427764 3418335648 3510463411 3703346016 3780499058 4011958184 4166264268 4320570352 4513452957 4860641646 5555019024 5670748587 6017937276 6480855528 7020926822 7290962469 7560998116 8023916368 8332528536 8641140704 9026905914 9721283292 10531390233 11110038048 11341497174 12035874552 12961711056 13540358871 14041853644 14581924938 15121996232 16047832736 16665057072 17012245761 18053811828 19442566584 21062780466 22682994348 24071749104 24573243877 25923422112 27080717742 28083707288 29163849876 30243992464 31594170699 33330114144 34024491522 36107623656 38885133168 42125560932 45365988696 48143498208 49146487754 51036737283 54161435484 56167414576 58327699752 60487984928 63188341398 68048983044 72215247312 73719731631 77770266336 84251121864 90731977392 94782512097 98292975508 102073474566 108322870968 112334829152 116655399504 126376682796 136097966088 144430494624 147439463262 168502243728 181463954784 189565024194 196585951016 204146949132 216645741936 221159194893 233310799008 252753365592 272195932176 294878926524 337004487456 379130048388 393171902032 408293898264 433291483872 442318389786 505506731184 544391864352 589757853048 663477584679 758260096776 786343804064 816587796528 884636779572 1011013462368 1179515706096 1326955169358 1516520193552 1633175593056 1769273559144 2359031412192 2653910338716 3033040387104 3538547118288 5307820677432 7077094236576 10615641354864 21231282709728
• Sum of all divisors σ(n): 77588332753680
• Sum of proper divisors (its aliquot sum) s(n): 56357050043952
• 21231282709728 is an abundant number, because the sum of its proper divisors (56357050043952) is greater than itself. Its abundance is 35125767334224

Bases of 21231282709728

• Binary: 100110100111101001011000100000110010011100000₂
• Hexadecimal: 0x134F4B1064E0
• Base-36: 7IXILJSO0

Squares and roots of 21231282709728

• 21231282709728 squared (21231282709728²) is 450767365500395126305833984
• 21231282709728 cubed (21231282709728³) is 9570369373258180819889211762274429796352
• The square root of 21231282709728 is 4607741.6062240295
• The cube root of 21231282709728 is 27690.1565504709

Scales and comparisons

• 21,231,282,709,728 seconds is equal to 675,089 years, 6 weeks, 18 hours, 28 minutes, 48 seconds.
• To count from 1 to 21,231,282,709,728 would take you about one million, six hundred eighty-seven thousand, seven hundred twenty-two 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 21231282709728 cubic inches would be around 2307.5 feet tall.

Recreational maths with 21231282709728

• 21231282709728 backwards is 82790728213212
• 21231282709728 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 21231282709728's digits is 54
• More coming soon!