18918391331385

Names of 18918391331385

• Cardinal: 18918391331385 can be written as Eighteen trillion, nine hundred eighteen billion, three hundred ninety-one million, three hundred thirty-one thousand, three hundred eighty-five.

Scientific notation

• Scientific notation: 1.8918391331385 × 10¹³

Factors of 18918391331385

• Number of distinct prime factors ω(n): 8
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 201586

Divisors of 18918391331385

• Number of divisors d(n): 384
• Complete list of divisors:
  1 3 5 7 9 13 15 17 19 21 35 39 45 51 57 63 65 71 85 91 95 105 117 119 133 153 171 195 213 221 247 255 273 285 315 323 355 357 399 455 497 585 595 639 663 665 741 765 819 855 923 969 1065 1071 1105 1197 1207 1235 1349 1365 1491 1547 1615 1729 1785 1989 1995 2223 2261 2485 2769 2907 3195 3315 3621 3705 4047 4095 4199 4473 4615 4641 4845 5187 5355 5985 6035 6461 6745 6783 7455 7735 8307 8449 8645 9443 9945 10863 11115 11305 12141 12597 13845 13923 14535 15561 15691 17537 18105 19383 20235 20349 20995 22365 22933 23205 25347 25935 28329 29393 32305 33915 37791 41535 42245 47073 47215 52611 54315 58149 60705 62985 68799 69615 76041 77805 78455 84987 87685 88179 96915 101745 109837 114665 122759 126735 141219 141645 146965 157833 160531 188955 201451 206397 235365 263055 264537 290745 298129 329511 343995 368277 380205 424935 440895 481593 549185 604353 613795 706095 789165 802655 894387 988533 1007255 1031985 1104831 1322685 1410157 1444779 1490645 1647555 1813059 1841385 2086903 2407965 2618863 2683161 3021765 3424667 3827569 4230471 4471935 4942665 5524155 6260709 7050785 7223895 7856589 9065295 10274001 10434515 11482707 12691413 13094315 13415805 14303021 17123335 18332041 18782127 19137845 21152355 23569767 23972669 26792983 30822003 31303545 34448121 39282945 42909063 44520671 49758397 51370005 54996123 57413535 63457065 65068673 71515105 71918007 80378949 91660205 93910635 100121147 117848835 119863345 128727189 133562013 133964915 149275191 154110015 164988369 172240605 185939273 195206019 214545315 215754021 222603355 241136847 243151357 248791985 271757399 274980615 300363441 311644697 325343365 348308779 359590035 400686039 401894745 447825573 455480711 500605735 557817819 585618057 643635945 667810065 729454071 746375955 815272197 824941845 845892749 901090323 929696365 934934091 976030095 1044926337 1078770105 1205684235 1215756785 1301574911 1358786995 1366442133 1501817205 1558223485 1673453457 1702059499 1741543895 1902301793 2003430195 2188362213 2239127865 2277403555 2445816591 2537678247 2789089095 2804802273 2928090285 3134779011 3160967641 3532846187 3647270355 3904724733 4076360985 4099326399 4229463745 4505451615 4619875783 4674670455 5106178497 5224631685 5706905379 5921249243 6507874555 6832210665 7613034741 8367267285 8510297495 9482902923 9511508965 10598538561 10941811065 11714174199 12229082955 12688391235 13859627349 14024011365 15318535491 15673895055 15804838205 17120716137 17664230935 17763747729 19523623665 20496631995 22126773487 23099378915 24729923309 25530892485 28448708769 28534526895 29606246215 31795615683 32339130481 38065173705 41578882047 47414514615 52992692805 53291243187 58570870995 60058385179 66380320461 69298136745 74189769927 76592677455 85603580685 88818738645 97017391443 110633867435 123649616545 142243543845 158978078415 161695652405 180175155537 199140961383 207894410235 222569309781 266456215935 291052174329 300291925895 331901602305 370948849635 420408696253 485086957215 540525466611 900875777685 995704806915 1112846548905 1261226088759 1455260871645 2102043481265 2702627333055 3783678266277 6306130443795 18918391331385
• Sum of all divisors σ(n): 45616210698240
• Sum of proper divisors (its aliquot sum) s(n): 26697819366855
• 18918391331385 is an abundant number, because the sum of its proper divisors (26697819366855) is greater than itself. Its abundance is 7779428035470

Bases of 18918391331385

• Binary: 100010011010011000111111111101011101000111001₂
• Hexadecimal: 0x1134C7FEBA39
• Base-36: 6PEZLQNG9

Squares and roots of 18918391331385

• 18918391331385 squared (18918391331385²) is 357905530567423112886018225
• 18918391331385 cubed (18918391331385³) is 6770996886941486559100339477409124491625
• The square root of 18918391331385 is 4349527.7136012135
• The cube root of 18918391331385 is 26645.7573236261

Scales and comparisons

• 18,918,391,331,385 seconds is equal to 601,546 years, 16 weeks, 6 days, 15 hours, 9 minutes, 45 seconds.
• To count from 1 to 18,918,391,331,385 would take you about one million, five hundred three thousand, eight hundred sixty-five 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 18918391331385 cubic inches would be around 2220.5 feet tall.

Recreational maths with 18918391331385

• 18918391331385 backwards is 58313319381981
• 18918391331385 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 18918391331385's digits is 63
• More coming soon!