18728121911840

Names of 18728121911840

• Cardinal: 18728121911840 can be written as Eighteen trillion, seven hundred twenty-eight billion, one hundred twenty-one million, nine hundred eleven thousand, eight hundred forty.

Scientific notation

• Scientific notation: 1.872812191184 × 10¹³

Factors of 18728121911840

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 84

Divisors of 18728121911840

• Number of divisors d(n): 576
• Complete list of divisors:
  1 2 4 5 8 10 11 16 20 22 23 32 40 43 44 46 55 80 86 88 92 110 115 121 160 172 176 184 215 220 230 242 253 344 352 368 430 440 460 473 484 506 529 605 688 736 860 880 920 946 968 989 1012 1058 1210 1265 1376 1720 1760 1840 1849 1892 1936 1978 2024 2116 2365 2420 2530 2645 2783 3440 3680 3698 3784 3872 3956 4048 4232 4730 4840 4945 5060 5203 5290 5566 5819 6880 7396 7568 7912 8096 8464 9245 9460 9680 9890 10120 10406 10580 10879 11132 11638 12167 13915 14792 15136 15824 16928 18490 18920 19360 19780 20240 20339 20812 21160 21758 22264 22747 23276 24334 26015 27830 29095 29584 31648 36980 37840 39560 40480 40678 41624 42320 42527 43516 44528 45494 46552 48668 52030 54395 55660 58190 59168 60835 64009 73960 75680 79120 79507 81356 83248 84640 85054 87032 89056 90988 93104 97336 101695 104060 108790 111320 113735 116380 119669 121670 128018 133837 147920 158240 159014 162712 166496 170108 174064 181976 186208 194672 203390 208120 212635 217580 222640 223729 227470 232760 239338 243340 250217 256036 267674 295840 318028 320045 325424 340216 348128 363952 389344 397535 406780 416240 425270 435160 445280 447458 454940 465520 467797 478676 486680 500434 512072 523181 535348 598345 636056 640090 650848 669185 680432 727904 795070 813560 832480 850540 870320 874577 894916 909880 931040 935594 957352 973360 978121 1000868 1024144 1046362 1070696 1118645 1196690 1251085 1272112 1280180 1338370 1360864 1472207 1590140 1627120 1701080 1740640 1749154 1789832 1819760 1828661 1871188 1914704 1946720 1956242 2001736 2048288 2092724 2141392 2237290 2338985 2393380 2502170 2544224 2560360 2615905 2676740 2752387 2944414 3180280 3254240 3402160 3498308 3579664 3639520 3657322 3742376 3829408 3912484 4003472 4185448 4282784 4372885 4474580 4677970 4786760 4890605 5004340 5120720 5145767 5231810 5353480 5504774 5754991 5888828 6360560 6804320 6996616 7159328 7314644 7361035 7484752 7824968 8006944 8370896 8745770 8949160 9143305 9355940 9573520 9620347 9781210 10008680 10241440 10291534 10463620 10706960 10759331 11009548 11509982 11777656 12721120 13761935 13993232 14629288 14722070 14969504 15649936 16741792 17491540 17898320 18286610 18711880 19147040 19240694 19562420 20017360 20115271 20583068 20927240 21413920 21518662 22019096 22496783 23019964 23555312 25728835 27523870 27986464 28774955 29258576 29444140 31299872 34983080 35796640 36573220 37423760 38481388 39124840 40034720 40230542 41166136 41854480 42059203 43037324 44038192 44993566 46039928 47110624 48101735 51457670 53796655 55047740 57549910 58517152 58888280 63304901 69966160 73146440 74847520 76962776 78249680 80461084 82332272 83708960 84118406 86074648 88076384 89987132 92079856 96203470 100576355 102915340 107593310 110095480 112483915 115099820 117776560 118352641 126609802 139932320 146292880 153925552 156499360 160922168 164664544 168236812 172149296 179974264 184159712 192406940 201152710 205830680 210296015 215186620 220190960 221267981 224967830 230199640 235553120 236705282 247464613 253219604 292585760 307851104 316524505 321844336 336473624 344298592 359948528 384813880 402305420 411661360 420592030 430373240 440381920 442535962 449935660 460399280 462651233 473410564 494929226 506439208 591763205 633049010 643688672 672947248 719897056 769627760 804610840 823322720 841184060 860746480 885071924 899871320 920798560 925302466 946821128 967361669 989858452 1012878416 1106339905 1183526410 1237323065 1266098020 1345894496 1539255520 1609221680 1682368120 1721492960 1770143848 1799742640 1850604932 1893642256 1934723338 1979716904 2025756832 2212679810 2313256165 2367052820 2474646130 2532196040 2722110743 3218443360 3364736240 3540287696 3599485280 3701209864 3787284512 3869446676 3959433808 4425359620 4626512330 4734105640 4836808345 4949292260 5064392080 5089163563 5444221486 6729472480 7080575392 7402419728 7738893352 7918867616 8850719240 9253024660 9468211280 9673616690 9898584520 10128784160 10178327126 10640978359 10888442972 13610553715 14804839456 15477786704 17701438480 18506049320 18936422560 19347233380 19797169040 20356654252 21281956718 21776885944 25445817815 27221107430 30955573408 35402876960 37012098640 38694466760 39594338080 40713308504 42563913436 43553771888 50891635630 53204891795 54442214860 74024197280 77388933520 81426617008 85127826872 87107543776 101783271260 106409783590 108884429720 117050761949 154777867040 162853234016 170255653744 203566542520 212819567180 217768859440 234101523898 340511307488 407133085040 425639134360 435537718880 468203047796 585253809745 814266170080 851278268720 936406095592 1170507619490 1702556537440 1872812191184 2341015238980 3745624382368 4682030477960 9364060955920 18728121911840
• Sum of all divisors σ(n): 52054101792000
• Sum of proper divisors (its aliquot sum) s(n): 33325979880160
• 18728121911840 is an abundant number, because the sum of its proper divisors (33325979880160) is greater than itself. Its abundance is 14597857968320

Bases of 18728121911840

• Binary: 100010000100001111011000011011100101000100000₂
• Hexadecimal: 0x11087B0DCA20
• Base-36: 6MZKW8NQ8

Squares and roots of 18728121911840

• 18728121911840 squared (18728121911840²) is 350742550344741536732185600
• 18728121911840 cubed (18728121911840³) is 6568749242525998319995439365133717504000
• The square root of 18728121911840 is 4327600.0175432109
• The cube root of 18728121911840 is 26556.1273467845

Scales and comparisons

• 18,728,121,911,840 seconds is equal to 595,496 years, 18 weeks, 6 hours, 37 minutes, 20 seconds.
• To count from 1 to 18,728,121,911,840 would take you about one million, four hundred eighty-eight thousand, seven hundred forty 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 18728121911840 cubic inches would be around 2213 feet tall.

Recreational maths with 18728121911840

• 18728121911840 backwards is 04811912182781
• The number of decimal digits it has is: 14
• The sum of 18728121911840's digits is 53
• More coming soon!