21518721404928

Names of 21518721404928

• Cardinal: 21518721404928 can be written as Twenty-one trillion, five hundred eighteen billion, seven hundred twenty-one million, four hundred four thousand, nine hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1518721404928 × 10¹³

Factors of 21518721404928

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 21
• Sum of prime factors: 116

Divisors of 21518721404928

• Number of divisors d(n): 1248
• Complete list of divisors:
  1 2 3 4 6 8 9 11 12 16 18 22 24 27 29 32 33 36 44 48 54 58 64 66 71 72 87 88 96 99 108 116 121 128 132 142 144 174 176 192 198 213 216 232 242 256 261 264 284 288 297 319 348 352 363 384 396 426 432 464 484 512 522 528 568 576 594 638 639 696 704 726 768 781 783 792 852 864 928 957 968 1024 1044 1056 1089 1136 1152 1188 1276 1278 1331 1392 1408 1452 1536 1562 1566 1584 1704 1728 1856 1914 1917 1936 2048 2059 2088 2112 2178 2272 2304 2343 2376 2552 2556 2662 2784 2816 2871 2904 3072 3124 3132 3168 3267 3408 3456 3509 3712 3828 3834 3872 3993 4096 4118 4176 4224 4356 4544 4608 4686 4752 5041 5104 5112 5324 5568 5632 5742 5808 6144 6177 6248 6264 6336 6534 6816 6912 7018 7029 7424 7656 7668 7744 7986 8236 8352 8448 8591 8613 8712 9088 9216 9372 9504 10082 10208 10224 10527 10648 11136 11264 11484 11616 11979 12288 12354 12496 12528 12672 13068 13632 13824 14036 14058 14848 15123 15312 15336 15488 15972 16472 16704 16896 17182 17226 17424 18176 18432 18531 18744 19008 20164 20416 20448 21054 21087 21296 22272 22528 22649 22968 23232 23958 24708 24992 25056 25344 25773 26136 27264 27648 28072 28116 29696 30246 30624 30672 30976 31581 31944 32944 33408 33792 34364 34452 34848 35937 36352 36864 37062 37488 38016 38599 40328 40832 40896 42108 42174 42592 44544 45056 45298 45369 45936 46464 47916 49416 49984 50112 50688 51546 52272 54528 55296 55451 55593 56144 56232 59392 60492 61248 61344 61952 63162 63888 65888 66816 67584 67947 68728 68904 69696 71874 72704 74124 74976 76032 77198 77319 80656 81664 81792 84216 84348 85184 89088 90596 90738 91872 92928 94501 94743 95832 98832 99968 100224 101376 103092 104544 109056 110592 110902 111186 112288 112464 115797 118784 120984 122496 122688 123904 126324 127776 131776 133632 135168 135894 136107 137456 137808 139392 143748 145408 146189 148248 149952 152064 154396 154638 161312 163328 163584 166353 168432 168696 170368 178176 181192 181476 183744 185856 189002 189486 191664 197664 199936 200448 202752 203841 206184 209088 218112 221804 222372 224576 224928 231594 231957 241968 244992 245376 247808 249139 252648 255552 263552 267264 271788 272214 274912 275616 278784 283503 287496 290816 292378 296496 299904 304128 308792 309276 322624 326656 327168 332706 336864 337392 340736 347391 356352 362384 362952 367488 371712 378004 378972 383328 395328 399872 400896 405504 407682 412368 418176 436224 438567 443608 444744 449152 449856 463188 463914 483936 489984 490752 495616 498278 499059 505296 511104 527104 534528 543576 544428 549824 551232 557568 567006 574992 584756 592992 599808 608256 609961 611523 617584 618552 645248 653312 654336 665412 673728 674784 681472 694782 724768 725904 734976 743424 747417 756008 757944 766656 790656 799744 801792 815364 824736 836352 850509 872448 877134 887216 889488 898304 899712 926376 927828 967872 979968 981504 996556 998118 1010592 1022208 1042173 1054208 1069056 1087152 1088856 1099648 1102464 1115136 1134012 1149984 1169512 1185984 1199616 1216512 1219922 1223046 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672460043904 742024876032 796989681664 896613391872 978123700224 1195484522496 1344920087808 1793226783744 1956247400448 2390969044992 2689840175616 3586453567488 5379680351232 7172907134976 10759360702464 21518721404928
• Sum of all divisors σ(n): 73575808214400
• Sum of proper divisors (its aliquot sum) s(n): 52057086809472
• 21518721404928 is an abundant number, because the sum of its proper divisors (52057086809472) is greater than itself. Its abundance is 30538365404544

Bases of 21518721404928

• Binary: 100111001001000110111101111101101000000000000₂
• Hexadecimal: 0x139237BED000
• Base-36: 7MLKB4LC0

Squares and roots of 21518721404928

• 21518721404928 squared (21518721404928²) is 463055370902906478142685184
• 21518721404928 cubed (21518721404928³) is 9964359521515247821217155046690890186752
• The square root of 21518721404928 is 4638827.5894807731
• The cube root of 21518721404928 is 27814.5574451725

Scales and comparisons

• 21,518,721,404,928 seconds is equal to 684,228 years, 40 weeks, 3 days, 12 hours, 28 minutes, 48 seconds.
• To count from 1 to 21,518,721,404,928 would take you about one million, seven hundred ten thousand, five hundred seventy-one 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 21518721404928 cubic inches would be around 2317.9 feet tall.

Recreational maths with 21518721404928

• 21518721404928 backwards is 82940412781512
• 21518721404928 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 21518721404928's digits is 54
• More coming soon!