21515120640

Names of 21515120640

• Cardinal: 21515120640 can be written as Twenty-one billion, five hundred fifteen million, one hundred twenty thousand, six hundred forty.

Scientific notation

• Scientific notation: 2.151512064 × 10¹⁰

Factors of 21515120640

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 19
• Sum of prime factors: 137

Divisors of 21515120640

• Number of divisors d(n): 832
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 13 15 16 18 20 24 26 27 30 32 36 39 40 41 45 48 52 54 60 64 65 72 73 78 80 82 90 96 104 108 117 120 123 128 130 135 144 146 156 160 164 180 192 195 205 208 216 219 234 240 246 256 260 270 288 292 312 320 328 351 360 365 369 384 390 410 416 432 438 468 480 492 512 520 533 540 576 584 585 615 624 640 656 657 702 720 730 738 768 780 820 832 864 876 936 949 960 984 1024 1040 1066 1080 1095 1107 1152 1168 1170 1230 1248 1280 1312 1314 1404 1440 1460 1476 1536 1560 1599 1640 1664 1728 1752 1755 1845 1872 1898 1920 1968 1971 2048 2080 2132 2160 2190 2214 2304 2336 2340 2460 2496 2560 2624 2628 2665 2808 2847 2880 2920 2952 2993 3072 3120 3198 3280 3285 3328 3456 3504 3510 3690 3744 3796 3840 3936 3942 4096 4160 4264 4320 4380 4428 4608 4672 4680 4745 4797 4920 4992 5120 5248 5256 5330 5535 5616 5694 5760 5840 5904 5986 6144 6240 6396 6560 6570 6656 6912 7008 7020 7380 7488 7592 7680 7872 7884 7995 8320 8528 8541 8640 8760 8856 8979 9216 9344 9360 9490 9594 9840 9855 9984 10240 10496 10512 10660 11070 11232 11388 11520 11680 11808 11972 12288 12480 12792 13120 13140 13312 13824 14016 14040 14235 14391 14760 14965 14976 15184 15360 15744 15768 15990 16640 17056 17082 17280 17520 17712 17958 18432 18688 18720 18980 19188 19680 19710 19968 20480 20992 21024 21320 22140 22464 22776 23040 23360 23616 23944 23985 24960 25584 25623 26240 26280 26624 26937 27648 28032 28080 28470 28782 29520 29930 29952 30368 30720 31488 31536 31980 33280 34112 34164 34560 35040 35424 35916 36864 37376 37440 37960 38376 38909 39360 39420 39936 41984 42048 42640 42705 44280 44895 44928 45552 46080 46720 47232 47888 47970 49920 51168 51246 52480 52560 53248 53874 55296 56064 56160 56940 57564 59040 59860 59904 60736 61440 62976 63072 63960 66560 68224 68328 69120 70080 70848 71832 71955 74752 74880 75920 76752 77818 78720 78840 79872 80811 83968 84096 85280 85410 88560 89790 89856 91104 92160 93440 94464 95776 95940 99840 102336 102492 104960 105120 107748 110592 112128 112320 113880 115128 116727 118080 119720 119808 121472 125952 126144 127920 128115 133120 134685 136448 136656 138240 140160 141696 143664 143910 149504 149760 151840 153504 155636 157440 157680 159744 161622 167936 168192 170560 170820 177120 179580 179712 182208 184320 186880 188928 191552 191880 194545 199680 204672 204984 209920 210240 215496 224256 224640 227760 230256 233454 236160 239440 239616 242944 251904 252288 255840 256230 266240 269370 272896 273312 276480 280320 283392 287328 287820 299008 299520 303680 307008 311272 314880 315360 323244 336384 341120 341640 350181 354240 359160 359424 364416 373760 377856 383104 383760 389090 399360 404055 409344 409968 419840 420480 430992 448512 449280 455520 460512 466908 472320 478880 479232 485888 503808 504576 511680 512460 538740 545792 546624 552960 560640 566784 574656 575640 583635 599040 607360 614016 622544 629760 630720 646488 672768 682240 683280 700362 708480 718320 718848 728832 747520 755712 766208 767520 778180 798720 808110 818688 819936 839680 840960 861984 897024 898560 911040 921024 933816 944640 957760 971776 1009152 1023360 1024920 1050543 1077480 1091584 1093248 1121280 1133568 1149312 1151280 1167270 1198080 1214720 1228032 1245088 1259520 1261440 1292976 1345536 1364480 1366560 1400724 1416960 1436640 1437696 1457664 1495040 1511424 1532416 1535040 1556360 1616220 1637376 1639872 1681920 1723968 1750905 1797120 1822080 1842048 1867632 1889280 1915520 1943552 2018304 2046720 2049840 2101086 2154960 2183168 2186496 2242560 2267136 2298624 2302560 2334540 2396160 2429440 2456064 2490176 2519040 2522880 2585952 2691072 2728960 2733120 2801448 2833920 2873280 2915328 3064832 3070080 3112720 3232440 3274752 3279744 3363840 3447936 3501810 3594240 3644160 3684096 3735264 3778560 3831040 3887104 4036608 4093440 4099680 4202172 4309920 4372992 4485120 4534272 4597248 4605120 4669080 4858880 4912128 4980352 5045760 5171904 5252715 5457920 5466240 5602896 5667840 5746560 5830656 6129664 6140160 6225440 6464880 6549504 6559488 6727680 6895872 7003620 7188480 7288320 7368192 7470528 7557120 7662080 8073216 8186880 8199360 8404344 8619840 8745984 9194496 9210240 9338160 9717760 9824256 9960704 10091520 10343808 10505430 10915840 10932480 11205792 11335680 11493120 11661312 12259328 12280320 12450880 12929760 13118976 13455360 13791744 14007240 14576640 14736384 14941056 15324160 16373760 16398720 16808688 17239680 17491968 18388992 18420480 18676320 19435520 19648512 19921408 20183040 20687616 21010860 21864960 22411584 22671360 22986240 24560640 24901760 25859520 26237952 27583488 28014480 29153280 29472768 29882112 30648320 32747520 32797440 33617376 34479360 34983936 36777984 36840960 37352640 39842816 40366080 41375232 42021720 43729920 44823168 45972480 49121280 49803520 51719040 52475904 55166976 56028960 58306560 58945536 59764224 61296640 65594880 67234752 68958720 73681920 74705280 79685632 82750464 84043440 87459840 89646336 91944960 98242560 99607040 103438080 104951808 110333952 112057920 119528448 131189760 134469504 137917440 147363840 149410560 159371264 165500928 168086880 174919680 179292672 183889920 199214080 206876160 224115840 239056896 262379520 268939008 275834880 294727680 298821120 331001856 336173760 358585344 398428160 413752320 448231680 478113792 524759040 537878016 551669760 597642240 672347520 717170688 796856320 827504640 896463360 1075756032 1195284480 1344695040 1434341376 1655009280 1792926720 2151512064 2390568960 2689390080 3585853440 4303024128 5378780160 7171706880 10757560320 21515120640
• Sum of all divisors σ(n): 85537630080
• Sum of proper divisors (its aliquot sum) s(n): 64022509440
• 21515120640 is an abundant number, because the sum of its proper divisors (64022509440) is greater than itself. Its abundance is 42507388800

Bases of 21515120640

• Binary: 10100000010011001101011000000000000₂
• Hexadecimal: 0x50266B000
• Base-36: 9VTJPC0

Squares and roots of 21515120640

• 21515120640 squared (21515120640²) is 462900416153754009600
• 21515120640 cubed (21515120640³) is 9959358297854222305427718144000
• The square root of 21515120640 is 146680.3348782651
• The cube root of 21515120640 is 2781.3005939269

Scales and comparisons

• 21,515,120,640 seconds is equal to 684 years, 5 weeks, 6 days, 14 hours, 24 minutes.
• To count from 1 to 21,515,120,640 would take you about one thousand, three hundred sixty-eight 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 21515120640 cubic inches would be around 231.8 feet tall.

Recreational maths with 21515120640

• 21515120640 backwards is 04602151512
• 21515120640 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21515120640's digits is 27
• More coming soon!