21918535308747

Names of 21918535308747

• Cardinal: 21918535308747 can be written as Twenty-one trillion, nine hundred eighteen billion, five hundred thirty-five million, three hundred eight thousand, seven hundred forty-seven.

Scientific notation

• Scientific notation: 2.1918535308747 × 10¹³

Factors of 21918535308747

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 31121

Divisors of 21918535308747

• Number of divisors d(n): 288
• Complete list of divisors:
  1 3 7 9 11 19 21 33 57 63 67 73 77 99 121 133 171 201 209 219 231 363 399 469 511 603 627 657 693 737 803 847 1089 1197 1273 1387 1407 1463 1533 1881 2211 2299 2409 2541 3819 4161 4221 4389 4599 4891 5159 5621 6633 6897 7227 7623 8107 8833 8911 9709 11457 12483 13167 14003 14673 15257 15477 16093 16863 20691 24321 26499 26733 29127 30941 34237 42009 44019 45771 46431 48279 50589 53801 56749 61831 72963 79497 80199 87381 92823 92929 98021 102711 106799 126027 137313 144837 154033 161403 167827 170247 185493 216587 278469 278787 294063 308133 320397 340351 376607 462099 484209 503481 510741 556479 587879 591811 649761 650503 836361 882189 961191 1021053 1022219 1078231 1129821 1174789 1386297 1510443 1763637 1775433 1949283 1951509 2073047 2258693 2382457 3063159 3066657 3234693 3389463 3524367 3743861 4115153 4142677 5290911 5326299 5854527 6219141 6466669 6776079 7147371 7155533 9199971 9704079 10573101 11231583 11244409 12345459 12428031 14511329 15810851 18657423 19400007 20328237 21442113 21466599 22803517 24845623 26207027 33694749 33733227 37036377 37284093 39387893 42915167 43533987 45266683 47432553 58200021 64399797 68410551 71133359 74536869 78621081 78710863 101199681 118163679 128745501 130601961 135800049 142297659 151332431 159624619 173919361 205231653 213400077 223610607 235863243 236132589 250838687 273301853 275715251 300406169 354491037 386236503 407400147 433266823 453997293 472066837 478873857 497933513 521758083 640200231 708397767 752516061 819905559 827145753 901218507 1059327017 1299800469 1361991879 1416200511 1436621571 1493800539 1565274249 1664656741 1755870809 1913112971 2257548183 2459716677 2481437259 2703655521 2875316189 3032867761 3177981051 3304467859 3899401407 4248601533 4481401617 4765935053 4993970223 5192735207 5267612427 5739338913 8625948567 9098603283 9533943153 9913403577 11652597187 14297805159 14981910669 15578205621 15802837281 17218016739 18311224151 20127213323 25877845701 27295809849 29740210731 31628478079 33361545371 34957791561 36349146449 42893415477 46734616863 54933672453 60381639969 94885434237 100084636113 104873374683 109047439347 128178569057 164801017359 181144919907 221399346553 284656302711 300253908339 327142318041 347913258869 384535707171 664198039659 1043739776607 1153607121513 1992594118977 2435392812083 3131219329821 7306178436249 21918535308747
• Sum of all divisors σ(n): 43072887836160
• Sum of proper divisors (its aliquot sum) s(n): 21154352527413
• 21918535308747 is a deficient number, because the sum of its proper divisors (21154352527413) is less than itself. Its deficiency is 764182781334

Bases of 21918535308747

• Binary: 100111110111101001110100000101101010111001011₂
• Hexadecimal: 0x13EF4E82D5CB
• Base-36: 7RP8I03WR

Squares and roots of 21918535308747

• 21918535308747 squared (21918535308747²) is 480422190080788946614710009
• 21918535308747 cubed (21918535308747³) is 10530150736391335274860997747568686148723
• The square root of 21918535308747 is 4681723.5404012271
• The cube root of 21918535308747 is 27985.7645787693

Scales and comparisons

• 21,918,535,308,747 seconds is equal to 696,941 years, 32 weeks, 3 days, 6 hours, 12 minutes, 27 seconds.
• To count from 1 to 21,918,535,308,747 would take you about one million, seven hundred forty-two thousand, three hundred fifty-four 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 21918535308747 cubic inches would be around 2332.1 feet tall.

Recreational maths with 21918535308747

• 21918535308747 backwards is 74780353581912
• 21918535308747 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 21918535308747's digits is 63
• More coming soon!