21018505894275840

Names of 21018505894275840

• Cardinal: 21018505894275840 can be written as Twenty-one quadrillion, eighteen trillion, five hundred five billion, eight hundred ninety-four million, two hundred seventy-five thousand, eight hundred forty.

Scientific notation

• Scientific notation: 2.101850589427584 × 10¹⁶

Factors of 21018505894275840

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 1046

Divisors of 21018505894275840

• Number of divisors d(n): 1296
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 37 40 41 48 60 64 74 80 82 96 111 120 123 128 148 149 160 164 185 192 205 222 240 246 256 296 298 320 328 370 384 410 444 447 480 492 555 592 596 615 640 656 740 745 768 809 820 888 894 960 984 1110 1184 1192 1230 1280 1312 1369 1480 1490 1517 1618 1640 1776 1788 1920 1968 2220 2235 2368 2384 2427 2460 2624 2738 2960 2980 3034 3236 3280 3552 3576 3840 3936 4045 4107 4440 4470 4551 4736 4768 4854 4920 5248 5476 5513 5920 5960 6068 6109 6472 6560 6845 7104 7152 7585 7872 8090 8214 8880 8940 9102 9472 9536 9708 9840 10496 10952 11026 11840 11920 12135 12136 12218 12944 13120 13690 14208 14304 15170 15744 16180 16428 16539 17760 17880 18204 18327 19072 19416 19680 20535 21904 22052 22755 23680 23840 24270 24272 24436 25888 26240 27380 27565 28416 28608 29933 30340 30545 31488 32360 32856 33078 33169 35520 35760 36408 36654 38144 38832 39360 41070 43808 44104 45510 47360 47680 48540 48544 48872 51776 52480 54760 55130 56129 57216 59866 60680 61090 64720 65712 66156 66338 71040 71520 72816 73308 77664 78720 82140 82695 87616 88208 89799 91020 91635 95360 97080 97088 97744 99507 103552 109520 110260 112258 114432 119732 120541 121360 122180 129440 131424 132312 132676 142080 143040 145632 146616 149665 155328 157440 164280 165390 165845 168387 175232 176416 179598 182040 183270 190720 194160 194176 195488 199014 203981 207104 219040 220520 224516 226033 239464 241082 242720 244360 258880 262848 264624 265352 280645 286080 291264 293232 299330 310656 328560 330780 331690 336774 350464 352832 359196 361623 364080 366540 388320 388352 390976 398028 407962 438080 441040 448995 449032 452066 478928 482164 485440 488720 497535 517760 525696 529248 530704 561290 572160 582528 586464 598660 602705 611943 621312 654481 657120 661560 663380 673548 678099 705664 718392 723246 728160 733080 776640 781952 796056 815924 841935 876160 882080 897990 898064 904132 957856 964328 970880 977440 995070 1019905 1035520 1051392 1058496 1061408 1107521 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5117727269120 5196169565952 5340067554440 5473569243301 5877658247840 5917372154920 6408081065328 6495211957440 6927655205760 7053189897408 7100846585904 7676590903680 8010101331660 8544108087104 8660282609920 8816487371760 8876058232380 9404253196544 9467795447872 10680135108880 10947138486602 11755316495680 11834744309840 12816162130656 12990423914880 13855310411520 14106379794816 14201693171808 15353181807360 16020202663320 16420707729903 17088216174208 17632974743520 17752116464760 18935590895744 21360270217760 21894276973204 23510632991360 23669488619680 25632324261312 25980847829760 27367846216505 28212759589632 28403386343616 32040405326640 32841415459806 34176432348416 35265949487040 35504232929520 37871181791488 42720540435520 43788553946408 47021265982720 47338977239360 51264648522624 54735692433010 56806772687232 64080810653280 65682830919612 70531898974080 71008465859040 82103538649515 85441080871040 87577107892816 94677954478720 102529297045248 109471384866020 113613545374464 128161621306560 131365661839224 141063797948160 142016931718080 164207077299030 170882161742080 175154215785632 189355908957440 218942769732040 256323242613120 262731323678448 284033863436160 328414154598060 350308431571264 437885539464080 512646485226240 525462647356896 568067726872320 656828309196120 700616863142528 875771078928160 1050925294713792 1313656618392240 1401233726285056 1751542157856320 2101850589427584 2627313236784480 3503084315712640 4203701178855168 5254626473568960 7006168631425280 10509252947137920 21018505894275840
• Sum of all divisors σ(n): 71236240584818400
• Sum of proper divisors (its aliquot sum) s(n): 50217734690542560
• 21018505894275840 is an abundant number, because the sum of its proper divisors (50217734690542560) is greater than itself. Its abundance is 29199228796266720

Bases of 21018505894275840

• Binary: 1001010101011000011100001000001100010011010101100000000₂
• Hexadecimal: 0x4AAC384189AB00
• Base-36: 5QYFSB3PM2O

Squares and roots of 21018505894275840

• 21018505894275840 squared (21018505894275840²) is 441777590027708228567678007705600
• 21018505894275840 cubed (21018505894275840³) is 9285504879956360955895282420622439318451912704000
• The square root of 21018505894275840 is 144977604.8025205857
• The cube root of 21018505894275840 is 275973.4356840547

Scales and comparisons

• 21,018,505,894,275,840 seconds is equal to 668,323,472 years, 48 weeks, 2 days, 17 hours, 4 minutes.
• To count from 1 to 21,018,505,894,275,840 would take you about two billion, four million, nine hundred seventy thousand, four hundred eighteen 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 21018505894275840 cubic inches would be around 22997.8 feet tall.

Recreational maths with 21018505894275840

• 21018505894275840 backwards is 04857249850581012
• The number of decimal digits it has is: 17
• The sum of 21018505894275840's digits is 69
• More coming soon!