21387367749678544

Names of 21387367749678544

• Cardinal: 21387367749678544 can be written as Twenty-one quadrillion, three hundred eighty-seven trillion, three hundred sixty-seven billion, seven hundred forty-nine million, six hundred seventy-eight thousand, five hundred forty-four.

Scientific notation

• Scientific notation: 2.1387367749678544 × 10¹⁶

Factors of 21387367749678544

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 3575241

Divisors of 21387367749678544

• Number of divisors d(n): 90
• Complete list of divisors:
  1 2 4 8 16 61 122 244 317 488 634 976 1268 2536 3721 5072 7442 14884 19337 29768 38674 59536 77348 100489 154696 200978 309392 401956 803912 1179557 1607824 2359114 3574861 4718228 6129829 7149722 9436456 12259658 14299444 18872912 24519316 28598888 49038632 57197776 98077264 218066521 373919569 436133042 747839138 872266084 1133230937 1495678276 1744532168 2266461874 2991356552 3489064336 4532923748 5982713104 9065847496 13302057781 18131694992 26604115562 53208231124 69127087157 106416462248 138254174314 212832924496 276508348628 359234207029 553016697256 718468414058 1106033394512 1436936828116 2873873656232 4216752316577 5747747312464 8433504633154 16867009266308 21913286628769 33734018532616 43826573257538 67468037065232 87653146515076 175306293030152 350612586060304 1336710484354909 2673420968709818 5346841937419636 10693683874839272 21387367749678544
• Sum of all divisors σ(n): 42261801609200082
• Sum of proper divisors (its aliquot sum) s(n): 20874433859521538
• 21387367749678544 is a deficient number, because the sum of its proper divisors (20874433859521538) is less than itself. Its deficiency is 512933890157006

Bases of 21387367749678544

• Binary: 1001011111110111011001010011001011001100111010111010000₂
• Hexadecimal: 0x4BFBB2996675D0
• Base-36: 5UL6T3SOQTS

Squares and roots of 21387367749678544

• 21387367749678544 squared (21387367749678544²) is 457419499259989867125215333959936
• 21387367749678544 cubed (21387367749678544³) is 9782999046547215906926496342613611778070574813184
• The square root of 21387367749678544 is 146244205.8670309987
• The cube root of 21387367749678544 is 277578.4708943569

Scales and comparisons

• 21,387,367,749,678,544 seconds is equal to 680,052,138 years, 50 weeks, 2 days, 5 hours, 49 minutes, 4 seconds.
• To count from 1 to 21,387,367,749,678,544 would take you about two billion, forty million, one hundred fifty-six thousand, four hundred sixteen 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 21387367749678544 cubic inches would be around 23131.5 feet tall.

Recreational maths with 21387367749678544

• 21387367749678544 backwards is 44587694776378312
• The number of decimal digits it has is: 17
• The sum of 21387367749678544's digits is 91
• More coming soon!