21455427836853621

Names of 21455427836853621

• Cardinal: 21455427836853621 can be written as Twenty-one quadrillion, four hundred fifty-five trillion, four hundred twenty-seven billion, eight hundred thirty-six million, eight hundred fifty-three thousand, six hundred twenty-one.

Scientific notation

• Scientific notation: 2.1455427836853621 × 10¹⁶

Factors of 21455427836853621

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 2032

Divisors of 21455427836853621

• Number of divisors d(n): 270
• Complete list of divisors:
  1 3 9 13 27 29 39 81 87 117 169 243 261 351 377 507 729 783 1053 1131 1521 1987 2187 2197 2349 3159 3393 4563 4901 5961 6561 6591 7047 9477 10179 13689 14703 17883 19773 21141 25831 28431 28561 30537 41067 44109 53649 57623 59319 63423 63713 77493 85293 85683 91611 123201 132327 160947 172869 177957 190269 191139 232479 257049 274833 335803 369603 396981 482841 518607 533871 573417 697437 749099 771147 824499 828269 1007409 1108809 1190943 1448523 1555821 1601613 1720251 2092311 2247297 2313441 2473497 2484807 3022227 3572829 3948169 4345569 4365439 4667463 4804839 5160753 6276933 6741891 6940323 7454421 9066681 9738287 10718487 11844507 13036707 13096317 14002389 14414517 15482259 18830799 20225673 20820969 22363263 27200043 29214861 32155461 35533521 39288951 42007167 46446777 51326197 56492397 56750707 60677019 62462907 67089789 81600129 87644583 106600563 114496901 117866853 126021501 126597731 139340331 153978591 169477191 170252121 182031057 187388721 201269367 244800387 262933749 319801689 343490703 353600559 378064503 379793193 418020993 461935773 510756363 546093171 603808101 667240561 734401161 788801247 959405067 1030472109 1060801677 1139379579 1385807319 1488459713 1532269089 1638279513 1645770503 1811424303 2001721683 2203203483 2366403741 2878215201 3091416327 3182405031 3418138737 4157421957 4465379139 4596807267 4914838539 4937311509 5434272909 6005165049 7099211223 8634645603 8674127293 9274248981 9547215093 10254416211 12472265871 13396137417 13790421801 14811934527 18015495147 19349976269 21297633669 25903936809 26022381879 27822746943 28641645279 30763248633 37416797613 40188412251 41371265403 44435803581 54046485441 58049928807 63892901007 78067145637 83468240829 92289745899 112250392839 112763654809 120565236753 124113796209 133307410743 162139456323 174149786421 234201436911 250404722487 251549691497 276869237697 336751178517 338290964427 361695710259 372341388627 399922232229 486418368969 522449359263 702604310733 751214167461 754649074491 830607713091 1014872893281 1085087130777 1199766696687 1459255106907 1567348077789 2107812932199 2263947223473 3044618679843 3255261392331 3270145989461 3599300090061 4377765320721 4702044233367 6323438796597 6791841670419 9133856039529 9765784176993 9810437968383 10797900270183 14106132700101 18970316389791 20375525011257 27401568118587 29431313905149 42318398100303 56910949169373 61126575033771 82204704355761 88293941715447 126955194300909 183379725101313 246614113067283 264881825146341 550139175303939 739842339201849 794645475439023 1650417525911817 2383936426317069 7151809278951207 21455427836853621
• Sum of all divisors σ(n): 36083544298194510
• Sum of proper divisors (its aliquot sum) s(n): 14628116461340889
• 21455427836853621 is a deficient number, because the sum of its proper divisors (14628116461340889) is less than itself. Its deficiency is 6827311375512732

Bases of 21455427836853621

• Binary: 1001100001110011001100100010010101110000011110101110101₂
• Hexadecimal: 0x4C399912B83D75
• Base-36: 5V9BBH7BYB9

Squares and roots of 21455427836853621

• 21455427836853621 squared (21455427836853621²) is 460335383662433250426316980811641
• 21455427836853621 cubed (21455427836853621³) is 9876692604919661939226070150727723311716289802061
• The square root of 21455427836853621 is 146476714.3161452165
• The cube root of 21455427836853621 is 277872.6010674671

Scales and comparisons

• 21,455,427,836,853,621 seconds is equal to 682,216,239 years, 11 weeks, 1 day, 16 hours, 40 minutes, 21 seconds.
• To count from 1 to 21,455,427,836,853,621 would take you about two billion, forty-six million, six hundred forty-eight thousand, seven hundred seventeen 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 21455427836853621 cubic inches would be around 23156.1 feet tall.

Recreational maths with 21455427836853621

• 21455427836853621 backwards is 12635863872455412
• The number of decimal digits it has is: 17
• The sum of 21455427836853621's digits is 72
• More coming soon!