21856398720

Names of 21856398720

• Cardinal: 21856398720 can be written as Twenty-one billion, eight hundred fifty-six million, three hundred ninety-eight thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.185639872 × 10¹⁰

Factors of 21856398720

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 702

Divisors of 21856398720

• Number of divisors d(n): 512
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 13 15 16 20 24 26 30 31 32 39 40 47 48 52 60 62 64 65 78 80 93 94 96 104 120 124 128 130 141 155 156 160 186 188 192 195 208 235 240 248 260 282 310 312 320 372 376 384 390 403 416 465 470 480 496 520 564 601 611 620 624 640 705 744 752 780 806 832 930 940 960 992 1040 1128 1202 1209 1222 1240 1248 1410 1457 1488 1504 1560 1612 1664 1803 1833 1860 1880 1920 1984 2015 2080 2256 2404 2418 2444 2480 2496 2820 2914 2976 3005 3008 3055 3120 3224 3606 3666 3720 3760 3968 4030 4160 4371 4512 4808 4836 4888 4960 4992 5640 5828 5952 6010 6016 6045 6110 6240 6448 7212 7285 7332 7440 7520 7813 8060 8320 8742 9015 9024 9165 9616 9672 9776 9920 11280 11656 11904 12020 12090 12220 12480 12896 14424 14570 14664 14880 15040 15626 16120 17484 18030 18048 18330 18631 18941 19232 19344 19552 19840 21855 22560 23312 23439 24040 24180 24440 24960 25792 28247 28848 29140 29328 29760 30080 31252 32240 34968 36060 36660 37262 37882 38464 38688 39065 39104 43710 45120 46624 46878 48080 48360 48880 51584 55893 56494 56823 57696 58280 58656 59520 62504 64480 69936 72120 73320 74524 75764 76928 77376 78130 78208 84741 87420 90240 93155 93248 93756 94705 96160 96720 97760 111786 112988 113646 115392 116560 117195 117312 125008 128960 139872 141235 144240 146640 149048 151528 154752 156260 169482 174840 186310 186496 187512 189410 192320 193440 195520 223572 225976 227292 230784 233120 234390 234624 242203 250016 257920 279465 279744 282470 284115 288480 293280 298096 303056 312520 338964 349680 367211 372620 375024 378820 384640 386880 391040 423705 447144 451952 454584 466240 468780 484406 500032 558930 559488 564940 568230 576960 586560 596192 606112 625040 677928 699360 726609 734422 745240 750048 757640 773760 847410 875657 894288 903904 909168 932480 937560 968812 1000064 1101633 1117860 1129880 1136460 1153920 1173120 1192384 1211015 1212224 1250080 1355856 1398720 1453218 1468844 1490480 1500096 1515280 1694820 1751314 1788576 1807808 1818336 1836055 1875120 1937624 2203266 2235720 2259760 2272920 2384768 2422030 2424448 2500160 2626971 2711712 2797440 2906436 2937688 2980960 3000192 3030560 3389640 3502628 3577152 3615616 3633045 3636672 3672110 3750240 3875248 4378285 4406532 4471440 4519520 4545840 4844060 5000320 5253942 5423424 5508165 5812872 5875376 5961920 6061120 6779280 7005256 7154304 7266090 7273344 7344220 7500480 7750496 8756570 8813064 8942880 9039040 9091680 9688120 10507884 10846848 11016330 11383541 11625744 11750752 11923840 12122240 13134855 13558560 14010512 14532180 14688440 15000960 15500992 17513140 17626128 17885760 18078080 18183360 19376240 21015768 22032660 22767082 23251488 23501504 26269710 27117120 28021024 29064360 29376880 31001984 34150623 35026280 35252256 35771520 36366720 38752480 42031536 44065320 45534164 46502976 47003008 52539420 54234240 56042048 56917705 58128720 58753760 68301246 70052560 70504512 77504960 84063072 88130640 91068328 93005952 105078840 112084096 113835410 116257440 117507520 136602492 140105120 141009024 155009920 168126144 170753115 176261280 182136656 210157680 227670820 232514880 235015040 273204984 280210240 336252288 341506230 352522560 364273312 420315360 455341640 465029760 546409968 560420480 683012460 705045120 728546624 840630720 910683280 1092819936 1366024920 1457093248 1681261440 1821366560 2185639872 2732049840 3642733120 4371279744 5464099680 7285466240 10928199360 21856398720
• Sum of all divisors σ(n): 79225896960
• Sum of proper divisors (its aliquot sum) s(n): 57369498240
• 21856398720 is an abundant number, because the sum of its proper divisors (57369498240) is greater than itself. Its abundance is 35513099520

Bases of 21856398720

• Binary: 10100010110101111100010110110000000₂
• Hexadecimal: 0x516BE2D80
• Base-36: A1GQH6O

Squares and roots of 21856398720

• 21856398720 squared (21856398720²) is 477702165007617638400
• 21856398720 cubed (21856398720³) is 10440848987813722942175182848000
• The square root of 21856398720 is 147839.0973998421
• The cube root of 21856398720 is 2795.9294048295

Scales and comparisons

• 21,856,398,720 seconds is equal to 694 years, 50 weeks, 1 day, 13 hours, 52 minutes.
• To count from 1 to 21,856,398,720 would take you about one thousand, three hundred eighty-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 21856398720 cubic inches would be around 233 feet tall.

Recreational maths with 21856398720

• 21856398720 backwards is 02789365812
• The number of decimal digits it has is: 11
• The sum of 21856398720's digits is 51
• More coming soon!