21287622720

Names of 21287622720

• Cardinal: 21287622720 can be written as Twenty-one billion, two hundred eighty-seven million, six hundred twenty-two thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.128762272 × 10¹⁰

Factors of 21287622720

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 5003

Divisors of 21287622720

• Number of divisors d(n): 448
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 12 13 14 15 16 20 21 24 26 28 30 32 35 39 40 42 48 49 52 56 60 64 65 70 78 80 84 91 96 98 104 105 112 120 130 140 147 156 160 168 182 192 195 196 208 210 224 240 245 260 273 280 294 312 320 336 343 364 390 392 416 420 448 455 480 490 520 546 560 588 624 637 672 686 728 735 780 784 832 840 910 960 980 1029 1040 1092 1120 1176 1248 1274 1344 1365 1372 1456 1470 1560 1568 1680 1715 1820 1911 1960 2058 2080 2184 2240 2352 2496 2548 2730 2744 2912 2940 3120 3136 3185 3360 3430 3640 3822 3920 4116 4160 4368 4459 4704 4973 5096 5145 5460 5488 5824 5880 6240 6370 6720 6860 7280 7644 7840 8232 8736 8918 9408 9555 9946 10192 10290 10920 10976 11760 12480 12740 13377 13720 14560 14919 15288 15680 16464 17472 17836 19110 19892 20384 20580 21840 21952 22295 23520 24865 25480 26754 27440 29120 29838 30576 32928 34811 35672 38220 39784 40768 41160 43680 44590 47040 49730 50960 53508 54880 59676 61152 64649 65856 66885 69622 71344 74595 76440 79568 82320 87360 89180 99460 101920 104433 107016 109760 119352 122304 129298 133770 139244 142688 149190 152880 159136 164640 174055 178360 193947 198920 203840 208866 214032 238704 243677 258596 267540 278488 285376 298380 305760 318272 323245 329280 348110 356720 387894 397840 417732 428064 452543 477408 487354 517192 522165 535080 556976 596760 611520 646490 696220 713440 731031 775788 795680 835464 856128 905086 954816 969735 974708 1034384 1044330 1070160 1113952 1193520 1218385 1292980 1357629 1392440 1426880 1462062 1551576 1591360 1670928 1705739 1810172 1939470 1949416 2068768 2088660 2140320 2227904 2262715 2387040 2436770 2585960 2715258 2784880 2924124 3103152 3167801 3341856 3411478 3620344 3655155 3878940 3898832 4137536 4177320 4280640 4525430 4774080 4873540 5117217 5171920 5430516 5569760 5848248 6206304 6335602 6683712 6788145 6822956 7240688 7310310 7757880 7797664 8354640 8528695 9050860 9503403 9747080 10234434 10343840 10861032 11139520 11696496 12412608 12671204 13576290 13645912 14481376 14620620 15515760 15595328 15839005 16709280 17057390 18101720 19006806 19494160 20468868 20687680 21722064 22174607 23392992 25342408 25586085 27152580 27291824 28962752 29241240 31031520 31678010 33418560 34114780 36203440 38013612 38988320 40937736 43444128 44349214 46785984 47517015 50684816 51172170 54305160 54583648 58482480 62063040 63356020 66523821 68229560 72406880 76027224 77976640 81875472 86888256 88698428 95034030 101369632 102344340 108610320 109167296 110873035 116964960 126712040 133047642 136459120 144813760 152054448 163750944 177396856 190068060 202739264 204688680 217220640 221746070 233929920 253424080 266095284 272918240 304108896 327501888 332619105 354793712 380136120 409377360 434441280 443492140 506848160 532190568 545836480 608217792 665238210 709587424 760272240 818754720 886984280 1013696320 1064381136 1330476420 1419174848 1520544480 1637509440 1773968560 2128762272 2660952840 3041088960 3547937120 4257524544 5321905680 7095874240 10643811360 21287622720
• Sum of all divisors σ(n): 84900211200
• Sum of proper divisors (its aliquot sum) s(n): 63612588480
• 21287622720 is an abundant number, because the sum of its proper divisors (63612588480) is greater than itself. Its abundance is 42324965760

Bases of 21287622720

• Binary: 10011110100110101110101100001000000₂
• Hexadecimal: 0x4F4D75840
• Base-36: 9S23MTC

Squares and roots of 21287622720

• 21287622720 squared (21287622720²) is 453162881069060198400
• 21287622720 cubed (21287622720³) is 9646760442906383768507547648000
• The square root of 21287622720 is 145902.7851687555
• The cube root of 21287622720 is 2771.4628078507

Scales and comparisons

• 21,287,622,720 seconds is equal to 676 years, 45 weeks, 5 days, 12 hours, 32 minutes.
• To count from 1 to 21,287,622,720 would take you about one thousand, three hundred fifty-three 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 21287622720 cubic inches would be around 231 feet tall.

Recreational maths with 21287622720

• 21287622720 backwards is 02722678212
• 21287622720 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21287622720's digits is 39
• More coming soon!