18991918253145888

Names of 18991918253145888

• Cardinal: 18991918253145888 can be written as Eighteen quadrillion, nine hundred ninety-one trillion, nine hundred eighteen billion, two hundred fifty-three million, one hundred forty-five thousand, eight hundred eighty-eight.

Scientific notation

• Scientific notation: 1.8991918253145888 × 10¹⁶

Factors of 18991918253145888

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 19
• Sum of prime factors: 72

Divisors of 18991918253145888

• Number of divisors d(n): 378
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 27 32 36 48 54 67 72 81 96 108 134 144 162 201 216 243 268 288 324 402 432 486 536 603 648 729 804 864 972 1072 1206 1296 1458 1608 1809 1944 2144 2187 2412 2592 2916 3216 3618 3888 4374 4489 4824 5427 5832 6432 6561 7236 7776 8748 8978 9648 10854 11664 13122 13467 14472 16281 17496 17956 19296 21708 23328 26244 26934 28944 32562 34992 35912 40401 43416 48843 52488 53868 57888 65124 69984 71824 80802 86832 97686 104976 107736 121203 130248 143648 146529 161604 173664 195372 209952 215472 242406 260496 293058 300763 323208 363609 390744 430944 439587 484812 520992 586116 601526 646416 727218 781488 879174 902289 969624 1090827 1172232 1203052 1292832 1454436 1562976 1758348 1804578 1939248 2181654 2344464 2406104 2706867 2908872 3272481 3516696 3609156 3878496 4363308 4688928 4812208 5413734 5817744 6544962 7033392 7218312 8120601 8726616 9624416 9817443 10827468 11635488 13089924 14066784 14436624 16241202 17453232 19634886 20151121 21654936 24361803 26179848 28873248 29452329 32482404 34906464 39269772 40302242 43309872 48723606 52359696 58904658 60453363 64964808 73085409 78539544 80604484 86619744 97447212 104719392 117809316 120906726 129929616 146170818 157079088 161208968 181360089 194894424 219256227 235618632 241813452 259859232 292341636 314158176 322417936 362720178 389788848 438512454 471237264 483626904 544080267 584683272 644835872 657768681 725440356 779577696 877024908 942474528 967253808 1088160534 1169366544 1315537362 1350125107 1450880712 1632240801 1754049816 1934507616 1973306043 2176321068 2338733088 2631074724 2700250214 2901761424 3264481602 3508099632 3946612086 4050375321 4352642136 4896722403 5262149448 5400500428 5803522848 6528963204 7016199264 7893224172 8100750642 8705284272 9793444806 10524298896 10801000856 12151125963 13057926408 14690167209 15786448344 16201501284 17410568544 19586889612 21048597792 21602001712 24302251926 26115852816 29380334418 31572896688 32403002568 36453377889 39173779224 43204003424 44070501627 48604503852 52231705632 58760668836 63145793376 64806005136 72906755778 78347558448 88141003254 90458382169 97209007704 109360133667 117521337672 129612010272 132211504881 145813511556 156695116896 176282006508 180916764338 194418015408 218720267334 235042675344 264423009762 271375146507 291627023112 328080401001 352564013016 361833528676 388836030816 437440534668 470085350688 528846019524 542750293014 583254046224 656160802002 705128026032 723667057352 814125439521 874881069336 984241203003 1057692039048 1085500586028 1166508092448 1312321604004 1410256052064 1447334114704 1628250879042 1749762138672 1968482406006 2115384078096 2171001172056 2442376318563 2624643208008 2894668229408 2952723609009 3256501758084 3499524277344 3936964812012 4230768156192 4342002344112 4884752637126 5249286416016 5905447218018 6513003516168 7327128955689 7873929624024 8684004688224 8858170827027 9769505274252 10498572832032 11810894436036 13026007032336 14654257911378 15747859248048 17716341654054 19539010548504 21981386867067 23621788872072 26052014064672 29308515822756 31495718496096 35432683308108 39078021097008 43962773734134 47243577744144 58617031645512 65944160601201 70865366616216 78156042194016 87925547468268 94487155488288 117234063291024 131888321202402 141730733232432 175851094936536 197832481803603 234468126582048 263776642404804 283461466464864 351702189873072 395664963607206 527553284809608 593497445410809 703404379746144 791329927214412 1055106569619216 1186994890821618 1582659854428824 2110213139238432 2373989781643236 3165319708857648 4747979563286472 6330639417715296 9495959126572944 18991918253145888
• Sum of all divisors σ(n): 56932396412156811
• Sum of proper divisors (its aliquot sum) s(n): 37940478159010923
• 18991918253145888 is an abundant number, because the sum of its proper divisors (37940478159010923) is greater than itself. Its abundance is 18948559905865035

Bases of 18991918253145888

• Binary: 1000011011110010000110010001101000101001111111100100000₂
• Hexadecimal: 0x43790C8D14FF20
• Base-36: 5702MSR4I00

Squares and roots of 18991918253145888

• 18991918253145888 squared (18991918253145888²) is 360692958934175957949208611308544
• 18991918253145888 cubed (18991918253145888³) is 6850251190563176575682324534168813154340212867072
• The square root of 18991918253145888 is 137811168.8258462163
• The cube root of 18991918253145888 is 266802.3255651835
• Being both a perfect square and a perfect cube, 18991918253145888 is also a perfect sixth number.

Scales and comparisons

• 18,991,918,253,145,888 seconds is equal to 603,884,254 years, 30 weeks, 4 days, 16 hours, 4 minutes, 48 seconds.
• To count from 1 to 18,991,918,253,145,888 would take you about one billion, eight hundred eleven million, six hundred fifty-two thousand, seven hundred sixty-three 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 18991918253145888 cubic inches would be around 22233.5 feet tall.

Recreational maths with 18991918253145888

• 18991918253145888 backwards is 88854135281919981
• The number of decimal digits it has is: 17
• The sum of 18991918253145888's digits is 90
• More coming soon!