18945731815920

Names of 18945731815920

• Cardinal: 18945731815920 can be written as Eighteen trillion, nine hundred forty-five billion, seven hundred thirty-one million, eight hundred fifteen thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 1.894573181592 × 10¹³

Factors of 18945731815920

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 13769531

Divisors of 18945731815920

• Number of divisors d(n): 480
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 13 14 15 16 18 20 21 24 26 27 28 30 35 36 39 40 42 45 48 49 52 54 56 60 63 65 70 72 78 80 84 90 91 98 104 105 108 112 117 120 126 130 135 140 144 147 156 168 180 182 189 195 196 208 210 216 234 240 245 252 260 270 273 280 294 312 315 336 351 360 364 378 390 392 420 432 441 455 468 490 504 520 540 546 560 585 588 624 630 637 702 720 728 735 756 780 784 819 840 882 910 936 945 980 1008 1040 1080 1092 1170 1176 1260 1274 1323 1365 1404 1456 1470 1512 1560 1638 1680 1755 1764 1820 1872 1890 1911 1960 2160 2184 2205 2340 2352 2457 2520 2548 2646 2730 2808 2940 3024 3120 3185 3276 3510 3528 3640 3780 3822 3920 4095 4368 4410 4680 4914 5040 5096 5292 5460 5616 5733 5880 6370 6552 6615 7020 7056 7280 7560 7644 8190 8820 9360 9555 9828 10192 10584 10920 11466 11760 12285 12740 13104 13230 14040 15120 15288 16380 17199 17640 19110 19656 21168 21840 22932 24570 25480 26460 28080 28665 30576 32760 34398 35280 38220 39312 45864 49140 50960 52920 57330 65520 68796 76440 85995 91728 98280 105840 114660 137592 152880 171990 196560 229320 275184 343980 458640 687960 1375920 13769501 27539002 41308503 55078004 68847505 82617006 96386507 110156008 123925509 137695010 165234012 179003513 192773014 206542515 220312016 247851018 275390020 289159521 330468024 358007026 371776527 385546028 413085030 481932535 495702036 537010539 550780040 578319042 619627545 660936048 674705549 716014052 743553054 771092056 826170060 867478563 895017565 963865070 991404072 1074021078 1101560080 1156638084 1239255090 1253024591 1349411098 1432028104 1445797605 1487106108 1542184112 1611031617 1652340120 1734957126 1790035130 1858882635 1927730140 1982808144 2024116647 2148042156 2313276168 2478510180 2506049182 2602435689 2685052695 2698822196 2864056208 2891595210 2974212216 3222063234 3304680240 3373527745 3469914252 3580070260 3717765270 3759073773 3855460280 4048233294 4296084312 4337392815 4626552336 4833094851 4957020360 5012098364 5204871378 5370105390 5397644392 5783190420 5948424432 6072349941 6265122955 6444126468 6747055490 6939828504 7160140520 7435530540 7518147546 7710920560 8055158085 8096466588 8592168624 8674785630 8771172137 9666189702 9914040720 10024196728 10120583235 10409742756 10740210780 10795288784 11277221319 11566380840 12144699882 12530245910 12888252936 13012178445 13494110980 13879657008 14320281040 14871061080 15036295092 16110316170 16192933176 17349571260 17542344274 18217049823 18795368865 19332379404 20048393456 20241166470 20819485512 21480421560 22554442638 23132761680 24165474255 24289399764 25060491820 25776505872 26024356890 26313516411 26988221960 29742122160 30072590184 30361749705 32220632340 32385866352 33831663957 34699142520 35084688548 36434099646 37590737730 38664758808 40482332940 41638971024 42960843120 43855860685 45108885276 48330948510 48578799528 50120983640 52048713780 52627032822 53976443920 56386106595 60145180368 60723499410 64441264680 67663327914 69398285040 70169377096 72868199292 75181475460 77329517616 78940549233 80964665880 87711721370 90217770552 91085249115 96661897020 97157599056 100241967280 104097427560 105254065644 112772213190 121446998820 128882529360 131567582055 135326655828 140338754192 145736398584 150362950920 157881098466 161929331760 169158319785 175423442740 180435541104 182170498230 193323794040 208194855120 210508131288 225544426380 236821647699 242893997640 263135164110 270653311656 291472797168 300725901840 315762196932 338316639570 350846885480 364340996460 386647588080 394702746165 421016262576 451088852760 473643295398 485787995280 526270328220 541306623312 631524393864 676633279140 701693770960 728681992920 789405492330 902177705520 947286590796 1052540656440 1184108238495 1263048787728 1353266558280 1457363985840 1578810984660 1894573181592 2105081312880 2368216476990 2706533116560 3157621969320 3789146363184 4736432953980 6315243938640 9472865907960 18945731815920
• Sum of all divisors σ(n): 81751185714240
• Sum of proper divisors (its aliquot sum) s(n): 62805453898320
• 18945731815920 is an abundant number, because the sum of its proper divisors (62805453898320) is greater than itself. Its abundance is 43859722082400

Bases of 18945731815920

• Binary: 100010011101100100101100111010110100111110000₂
• Hexadecimal: 0x113B259D69F0
• Base-36: 6PRJRK4C0

Squares and roots of 18945731815920

• 18945731815920 squared (18945731815920²) is 358940754040763340765446400
• 18945731815920 cubed (18945731815920³) is 6800395263860405325743106586661426688000
• The square root of 18945731815920 is 4352669.5045592423
• The cube root of 18945731815920 is 26658.5871187715

Scales and comparisons

• 18,945,731,815,920 seconds is equal to 602,415 years, 34 weeks, 5 days, 10 hours, 12 minutes.
• To count from 1 to 18,945,731,815,920 would take you about one million, five hundred six thousand and thirty-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 18945731815920 cubic inches would be around 2221.5 feet tall.

Recreational maths with 18945731815920

• 18945731815920 backwards is 02951813754981
• 18945731815920 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 18945731815920's digits is 63
• More coming soon!