21381215257665

Names of 21381215257665

• Cardinal: 21381215257665 can be written as Twenty-one trillion, three hundred eighty-one billion, two hundred fifteen million, two hundred fifty-seven thousand, six hundred sixty-five.

Scientific notation

• Scientific notation: 2.1381215257665 × 10¹³

Factors of 21381215257665

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 133

Divisors of 21381215257665

• Number of divisors d(n): 336
• Complete list of divisors:
  1 3 5 9 15 27 31 41 45 53 81 93 123 135 155 159 205 243 265 279 369 405 465 477 615 729 795 837 961 1107 1215 1271 1395 1431 1643 1845 2173 2385 2511 2809 2883 3321 3645 3813 4185 4293 4805 4929 5535 6355 6519 7155 7533 8215 8427 8649 9963 10865 11439 12555 12879 14045 14415 14787 16605 19065 19557 21465 22599 24645 25281 25947 29889 32595 34317 37665 38637 39401 42135 43245 44361 49815 50933 57195 58671 64395 67363 73935 75843 77841 87079 97785 102951 112995 115169 118203 126405 129735 133083 148877 149445 152799 171585 176013 193185 197005 202089 221805 227529 233523 254665 261237 293355 308853 336815 345507 354609 379215 389205 399249 435395 446631 458397 514755 528039 575845 591015 606267 665415 682587 700569 744385 763995 783711 880065 926559 1010445 1036521 1063827 1137645 1167615 1197747 1306185 1339893 1375191 1544265 1584117 1727535 1773045 1818801 1996245 2047761 2088253 2233155 2291985 2351133 2640195 2699449 3031335 3109563 3191481 3412935 3502845 3570239 3918555 4019679 4125573 4615187 4632795 5182605 5319135 5456403 5988735 6103957 6264759 6699465 6875955 7053399 7920585 8098347 9094005 9328689 9574443 10238805 10441265 10710717 11755665 12059037 12376719 13497245 13845561 15547815 15957405 16369209 17851195 18311871 18794277 20098395 20627865 21160197 23075935 24295041 27282015 27986067 28723329 30519785 31323795 32132151 35266995 36177111 37130157 40491735 41536683 46643445 47872215 49107627 53553585 54935613 56382831 60295185 61883595 63480591 69227805 72885123 81846045 83958201 91559355 93971385 96396453 105800985 108531333 110677409 121475205 124610049 139930335 143070797 143616645 160660755 164806839 169148493 180885555 185650785 189222667 207683415 218655369 245538135 274678065 281914155 289189359 317402955 332032227 364425615 373830147 419791005 429212391 481982265 494420517 507445479 542656665 553387045 567668001 623050245 655966107 715353985 824034195 845742465 867568077 946113335 996096681 1093276845 1121490441 1287637173 1445946795 1483261551 1522336437 1660161135 1703004003 1869150735 1967898321 2146061955 2472102585 2537227395 2602704231 2838340005 2988290043 3279830535 3364471323 3862911519 4337840385 4449784653 4980483405 5109012009 5607452205 5865902677 6438185865 7416307755 7611682185 8515020015 8964870129 9839491605 11588734557 13013521155 14941450215 15327036027 16822356615 17597708031 19314557595 22248923265 25545060045 26894610387 29329513385 34766203671 44824350645 45981108081 52793124093 57943672785 76635180135 80683831161 87988540155 104298611013 134473051935 137943324243 158379372279 173831018355 229905540405 263965620465 403419155805 475138116837 521493055065 689716621215 791896861395 1425414350511 2375690584185 4276243051533 7127071752555 21381215257665
• Sum of all divisors σ(n): 41502096029520
• Sum of proper divisors (its aliquot sum) s(n): 20120880771855
• 21381215257665 is a deficient number, because the sum of its proper divisors (20120880771855) is less than itself. Its deficiency is 1260334485810

Bases of 21381215257665

• Binary: 100110111001000110011101111011000010001000001₂
• Hexadecimal: 0x137233BD8441
• Base-36: 7KUE7IN29

Squares and roots of 21381215257665

• 21381215257665 squared (21381215257665²) is 457156365894606592341252225
• 21381215257665 cubed (21381215257665³) is 9774558665604445909499474807562129554625
• The square root of 21381215257665 is 4623982.6186594819
• The cube root of 21381215257665 is 27755.1851394285

Scales and comparisons

• 21,381,215,257,665 seconds is equal to 679,856 years, 26 weeks, 3 days, 4 hours, 27 minutes, 45 seconds.
• To count from 1 to 21,381,215,257,665 would take you about one million, six hundred ninety-nine thousand, six hundred forty-one 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 21381215257665 cubic inches would be around 2312.9 feet tall.

Recreational maths with 21381215257665

• 21381215257665 backwards is 56675251218312
• The number of decimal digits it has is: 14
• The sum of 21381215257665's digits is 54
• More coming soon!