218490978548721021

Names of 218490978548721021

• Cardinal: 218490978548721021 can be written as Two hundred eighteen quadrillion, four hundred ninety trillion, nine hundred seventy-eight billion, five hundred forty-eight million, seven hundred twenty-one thousand and twenty-one.

Scientific notation

• Scientific notation: 2.18490978548721021 × 10¹⁷

Factors of 218490978548721021

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 1145

Divisors of 218490978548721021

• Number of divisors d(n): 144
• Complete list of divisors:
  1 3 11 13 33 39 143 169 241 429 507 723 877 1859 2631 2651 3133 5577 7953 9399 9647 11401 28941 34203 34463 40729 58081 103389 122187 125411 148213 174243 211357 376233 444639 448019 634071 638891 755053 769129 1344057 1630343 1916673 2265159 2307387 2324927 2747641 4891029 6974781 8242923 8305583 8460419 9815689 9998677 24916749 25381257 29447067 29996031 30224051 35719333 50937037 90672153 107157999 107972579 109985447 129982801 152811111 185360089 323917737 329956341 389948403 392912663 556080267 560307407 662181481 674526133 1178737989 1429810811 1680922221 1986544443 2023578399 2038960979 2409681157 4289432433 6116882937 7229043471 7283996291 7419787463 8608359253 8768839729 21851988873 22259362389 25825077759 26306519187 26506492727 31325855041 44671781449 79519478181 93977565123 94691951783 96457237019 113994916477 134015344347 162560798053 284075855349 289371711057 341984749431 344584405451 487682394159 491389595939 580733158837 1033753216353 1253944081247 1474168787817 1742199476511 1788168778583 2113290374689 3761832243741 5364506335749 6339871124067 6388064747207 7549531064881 19164194241621 22648593194643 23246194121579 27472774870957 39177152330773 69738582364737 82418324612871 83044841713691 117531456992319 249134525141073 302200523580527 430948675638503 509302980300049 906601570741581 1292846026915509 1527908940900147 5602332783300539 6620938743900637 16806998349901617 19862816231701911 72830326182907007 218490978548721021
• Sum of all divisors σ(n): 345960446855964480
• Sum of proper divisors (its aliquot sum) s(n): 127469468307243459
• 218490978548721021 is a deficient number, because the sum of its proper divisors (127469468307243459) is less than itself. Its deficiency is 91021510241477562

Bases of 218490978548721021

• Binary: 1100001000001111000110001100101011000001100010010101111101₂
• Hexadecimal: 0x3083C632B06257D
• Base-36: 1NRCL5VI0KFX

Squares and roots of 218490978548721021

• 218490978548721021 squared (218490978548721021²) is 47738307707177669355991834887282441
• 218490978548721021 cubed (218490978548721021³) is 10430389565201199543245985921957112403330338940892261
• The square root of 218490978548721021 is 467430185.7483329255
• The cube root of 218490978548721021 is 602297.6517155735

Scales and comparisons

• 218,490,978,548,721,021 seconds is equal to 6,947,337,280 years, 45 weeks, 4 days, 19 hours, 50 minutes, 21 seconds.
• To count from 1 to 218,490,978,548,721,021 would take you about twenty billion, eight hundred forty-two million, eleven thousand, eight hundred forty-two 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 218490978548721021 cubic inches would be around 50191.5 feet tall.

Recreational maths with 218490978548721021

• 218490978548721021 backwards is 120127845879094812
• The number of decimal digits it has is: 18
• The sum of 218490978548721021's digits is 78
• More coming soon!