21427256739

Names of 21427256739

• Cardinal: 21427256739 can be written as Twenty-one billion, four hundred twenty-seven million, two hundred fifty-six thousand, seven hundred thirty-nine.

Scientific notation

• Scientific notation: 2.1427256739 × 10¹⁰

Factors of 21427256739

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 485

Divisors of 21427256739

• Number of divisors d(n): 128
• Complete list of divisors:
  1 3 7 17 21 37 51 53 111 119 127 159 241 259 357 371 381 629 723 777 889 901 1113 1687 1887 1961 2159 2667 2703 4097 4403 4699 5061 5883 6307 6477 6731 8917 12291 12773 13209 13727 14097 15113 18921 20193 26751 28679 30607 32893 33337 38319 41181 45339 47117 62419 79883 86037 89411 91821 98679 100011 114427 141351 151589 187257 214249 217141 233359 239649 249047 268233 343281 454767 472601 520319 559181 642747 651423 700077 747141 800989 1061123 1132459 1417803 1519987 1560957 1622171 1677543 1743329 2402967 3183369 3308207 3397377 3642233 4233799 4559961 4866513 5229987 7927213 8034217 9924621 10926699 11355197 12701397 19251803 23781639 24102651 27576907 29636593 34065591 56239519 57755409 60020327 82730721 88909779 134762621 168718557 180060981 193038349 404287863 420142289 579115047 1020345559 1260426867 3061036677 7142418913 21427256739
• Sum of all divisors σ(n): 36612145152
• Sum of proper divisors (its aliquot sum) s(n): 15184888413
• 21427256739 is a deficient number, because the sum of its proper divisors (15184888413) is less than itself. Its deficiency is 6242368326

Bases of 21427256739

• Binary: 10011111101001010011111110110100011₂
• Hexadecimal: 0x4FD29FDA3
• Base-36: 9UD8H43

Squares and roots of 21427256739

• 21427256739 squared (21427256739²) is 459127331359020914121
• 21427256739 cubed (21427256739³) is 9837839204921666910541137511419
• The square root of 21427256739 is 146380.5203536317
• The cube root of 21427256739 is 2777.5093170319

Scales and comparisons

• 21,427,256,739 seconds is equal to 681 years, 16 weeks, 4 days, 15 hours, 45 minutes, 39 seconds.
• To count from 1 to 21,427,256,739 would take you about one thousand, three hundred sixty-two 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 21427256739 cubic inches would be around 231.5 feet tall.

Recreational maths with 21427256739

• 21427256739 backwards is 93765272412
• The number of decimal digits it has is: 11
• The sum of 21427256739's digits is 48
• More coming soon!