21309898365

Names of 21309898365

• Cardinal: 21309898365 can be written as Twenty-one billion, three hundred nine million, eight hundred ninety-eight thousand, three hundred sixty-five.

Scientific notation

• Scientific notation: 2.1309898365 × 10¹⁰

Factors of 21309898365

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 506

Divisors of 21309898365

• Number of divisors d(n): 144
• Complete list of divisors:
  1 3 5 7 9 15 21 27 35 45 49 63 81 105 135 147 189 243 245 315 405 441 491 567 729 735 945 1215 1323 1473 1701 2187 2205 2455 2835 3437 3645 3969 4419 5103 6561 6615 7365 8505 10311 10935 11907 13257 15309 17185 19683 19845 22095 24059 25515 30933 32805 35721 39771 45927 51555 59049 59535 66285 72177 76545 92799 98415 107163 119313 120295 137781 154665 177147 178605 198855 216531 229635 278397 295245 321489 357939 360885 413343 463995 535815 596565 649593 688905 835191 885735 964467 1073817 1082655 1240029 1391985 1607445 1789695 1948779 2066715 2505573 2893401 3221451 3247965 4175955 4822335 5369085 5846337 6200145 7516719 8680203 9664353 9743895 12527865 14467005 16107255 17539011 22550157 28993059 29231685 37583595 43401015 48321765 52617033 67650471 86979177 87695055 112750785 144965295 157851099 202951413 263085165 338252355 434895885 473553297 608854239 789255495 1014757065 1420659891 2367766485 3044271195 4261979673 7103299455 21309898365
• Sum of all divisors σ(n): 44711110080
• Sum of proper divisors (its aliquot sum) s(n): 23401211715
• 21309898365 is an abundant number, because the sum of its proper divisors (23401211715) is greater than itself. Its abundance is 2091313350

Bases of 21309898365

• Binary: 10011110110001010110011111001111101₂
• Hexadecimal: 0x4F62B3E7D
• Base-36: 9SFD2T9

Squares and roots of 21309898365

• 21309898365 squared (21309898365²) is 454111768326629673225
• 21309898365 cubed (21309898365³) is 9677075629390904459417911777125
• The square root of 21309898365 is 145979.1024941583
• The cube root of 21309898365 is 2772.4291690883

Scales and comparisons

• 21,309,898,365 seconds is equal to 677 years, 30 weeks, 4 days, 8 hours, 12 minutes, 45 seconds.
• To count from 1 to 21,309,898,365 would take you about one thousand, three hundred fifty-five 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 21309898365 cubic inches would be around 231 feet tall.

Recreational maths with 21309898365

• 21309898365 backwards is 56389890312
• The number of decimal digits it has is: 11
• The sum of 21309898365's digits is 54
• More coming soon!