18512123138984312721

Names of 18512123138984312721

• Cardinal: 18512123138984312721 can be written as Eighteen quintillion, five hundred twelve quadrillion, one hundred twenty-three trillion, one hundred thirty-eight billion, nine hundred eighty-four million, three hundred twelve thousand, seven hundred twenty-one.

Scientific notation

• Scientific notation: 1.8512123138984312721 × 10¹⁹

Factors of 18512123138984312721

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 140942

Divisors of 18512123138984312721

• Number of divisors d(n): 243
• Complete list of divisors:
  1 3 9 13 27 29 39 81 87 117 169 243 261 351 377 507 729 783 841 1053 1131 1521 2187 2349 2523 3159 3393 4563 4901 6561 7047 7569 9477 10179 10933 13689 14703 21141 22707 28431 30537 32799 41067 44109 63423 68121 85293 91611 98397 123201 132327 140897 142129 190269 204363 274833 295191 369603 396981 422691 426387 613089 824499 885573 1108809 1190943 1268073 1279161 1831661 1839267 2473497 2656719 3572829 3804219 3837483 4086013 5494983 5517801 7970157 10718487 11412657 11512449 12258039 16484949 23811593 23910471 32155461 34237971 34537347 36774117 49454847 53118169 71434779 71731413 102713913 103612041 110322351 118494377 148364541 159354507 214304337 308141739 310836123 330967053 355483131 445093623 478063521 642913011 690536197 924425217 932508369 992901159 1066449393 1335280869 1434190563 1540426901 1928739033 2071608591 2978703477 3199348179 4005842607 4302571689 4621280703 5786217099 6214825773 8936110431 9598044537 12017527821 12907715067 13863842109 17358651297 18644477319 19851964609 20025549713 26808331293 28794133611 38723145201 41591526327 52075953891 55933431957 59555893827 60076649139 86382400833 116169435603 124774578981 156227861673 167800295871 178667681481 180229947417 258075539917 259147202499 348508306809 374323736943 503400887613 536003044443 540689842251 575706973661 774226619751 777441607497 1122971210829 1510202662839 1608009133329 1622069526753 1727120920983 2322679859253 3354982018921 3368913632487 4530607988517 4824027399987 4866208580259 5181362762949 6968039577759 7484190657593 10064946056763 10106740897461 14472082199961 14598625740777 15544088288847 16695502236169 20904118733277 22452571972779 30194838170289 43416246599883 43795877222331 46632264866541 50086506708507 62712356199831 67357715918337 90584514510867 97294478548709 130248739799649 131387631666993 139896794599623 150259520125521 188137068599493 202073147755011 217041529070197 271753543532601 291883435646127 419690383798869 450778560376563 564411205798479 606219443265033 651124587210591 815260630597803 875650306938381 1259071151396607 1352335681129689 1693233617395437 1818658329795099 1953373761631773 2445781891793409 2626950920815143 2821539877912561 3777213454189821 4057007043389067 5455974989385297 5860121284895319 7337345675380227 7880852762445429 8464619633737683 12171021130167201 16367924968155891 17580363854685957 22012037026140681 23642558287336287 25393858901213049 36513063390501603 49103774904467673 52741091564057871 70927674862008861 76181576703639147 109539190171504809 158223274692173613 212783024586026583 228544730110917441 474669824076520839 638349073758079749 685634190332752323 1424009472229562517 2056902570998256969 6170707712994770907 18512123138984312721
• Sum of all divisors σ(n): 31139744952933227091
• Sum of proper divisors (its aliquot sum) s(n): 12627621813948914370
• 18512123138984312721 is a deficient number, because the sum of its proper divisors (12627621813948914370) is less than itself. Its deficiency is 5884501325035398351

Bases of 18512123138984312721

• Binary: 10000000011101000010001011110100111011001011100101111111110010001₂
• Hexadecimal: 0x100E845E9D972FF91
• Base-36: 3WN9RZ24FXW29

Squares and roots of 18512123138984312721

• 18512123138984312721 squared (18512123138984312721²) is 342698703112918403639872548528722423841
• 18512123138984312721 cubed (18512123138984312721³) is 6344080591596572099671955909127329492301930248722649981361
• 18512123138984312721 is a perfect square number. Its square root is 4302571689
• The cube root of 18512123138984312721 is 2645363.8239141675

Scales and comparisons

• 18,512,123,138,984,312,721 seconds is equal to 293,274,701,009 years, 3 weeks, 3 days, 15 hours, 30 minutes, 7 seconds.
• To count from 1 to 18,512,123,138,984,312,721 would take you about two hundred ninety-three billion, two hundred seventy-four million, seven hundred one thousand and 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 18512123138984312721 cubic inches would be around 220447 feet tall.

Recreational maths with 18512123138984312721

• 18512123138984312721 backwards is 12721348983132121581
• The number of decimal digits it has is: 20
• The sum of 18512123138984312721's digits is 72
• More coming soon!