21397867381845

Names of 21397867381845

• Cardinal: 21397867381845 can be written as Twenty-one trillion, three hundred ninety-seven billion, eight hundred sixty-seven million, three hundred eighty-one thousand, eight hundred forty-five.

Scientific notation

• Scientific notation: 2.1397867381845 × 10¹³

Factors of 21397867381845

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 4532

Divisors of 21397867381845

• Number of divisors d(n): 126
• Complete list of divisors:
  1 3 5 9 15 17 27 45 51 81 85 135 153 243 255 289 405 459 729 765 867 1215 1377 1445 2295 2601 3645 4131 4335 4507 6885 7803 12393 13005 13521 20655 22535 23409 39015 40563 61965 67605 70227 76619 117045 121689 202815 210681 229857 351135 365067 383095 608445 689571 1053405 1095201 1149285 1302523 1825335 2068713 3285603 3447855 3907569 5476005 6206139 6512615 10343565 11722707 16428015 18618417 19537845 20313049 31030695 35168121 55855251 58613535 60939147 93092085 101565245 105504363 175840605 182817441 279276255 304695735 316513089 345321833 527521815 548452323 914087205 949539267 1035965499 1582565445 1645356969 1726609165 2742261615 3107896497 4747696335 4936070907 5179827495 5870471161 8226784845 9323689491 14808212721 15539482485 17611413483 24680354535 27971068473 29352355805 46618447455 52834240449 74041063605 83913205419 88057067415 139855342365 158502721347 251739616257 264171202245 419566027095 475508164041 792513606735 1258698081285 1426524492123 2377540820205 4279573476369 7132622460615 21397867381845
• Sum of all divisors σ(n): 40905459413442
• Sum of proper divisors (its aliquot sum) s(n): 19507592031597
• 21397867381845 is a deficient number, because the sum of its proper divisors (19507592031597) is less than itself. Its deficiency is 1890275350248

Bases of 21397867381845

• Binary: 100110111011000010100010010001100010001010101₂
• Hexadecimal: 0x13761448C455
• Base-36: 7L21LRGB9

Squares and roots of 21397867381845

• 21397867381845 squared (21397867381845²) is 457868728491026195035604025
• 21397867381845 cubed (21397867381845³) is 9797414330544973845543812634984893926125
• The square root of 21397867381845 is 4625782.8939375225
• The cube root of 21397867381845 is 27762.3887034001

Scales and comparisons

• 21,397,867,381,845 seconds is equal to 680,385 years, 51 weeks, 5 days, 2 hours, 30 minutes, 45 seconds.
• To count from 1 to 21,397,867,381,845 would take you about one million, seven hundred thousand, nine hundred sixty-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 21397867381845 cubic inches would be around 2313.5 feet tall.

Recreational maths with 21397867381845

• 21397867381845 backwards is 54818376879312
• The number of decimal digits it has is: 14
• The sum of 21397867381845's digits is 72
• More coming soon!