21307384665

Names of 21307384665

• Cardinal: 21307384665 can be written as Twenty-one billion, three hundred seven million, three hundred eighty-four thousand, six hundred sixty-five.

Scientific notation

• Scientific notation: 2.1307384665 × 10¹⁰

Factors of 21307384665

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 1529

Divisors of 21307384665

• Number of divisors d(n): 128
• Complete list of divisors:
  1 3 5 7 9 15 21 27 35 45 49 63 105 135 147 189 245 315 343 421 441 735 945 1029 1093 1263 1323 1715 2105 2205 2947 3087 3279 3789 5145 5465 6315 6615 7651 8841 9261 9837 11367 14735 15435 16395 18945 20629 22953 26523 29511 38255 44205 46305 49185 53557 56835 61887 68859 79569 103145 114765 132615 144403 147555 160671 185661 206577 267785 309435 344295 374899 397845 433209 460153 482013 556983 722015 803355 928305 1032885 1124697 1299627 1380459 1446039 1874495 2166045 2300765 2410065 2784915 3221071 3374091 3898881 4141377 5623485 6498135 6902295 7230195 9663213 10122273 12424131 16105355 16870455 19494405 20706885 22547497 28989639 48316065 50611365 62120655 67642491 86968917 112737485 144948195 157832479 202927473 338212455 434844585 473497437 608782419 789162395 1014637365 1420492311 2367487185 3043912095 4261476933 7102461555 21307384665
• Sum of all divisors σ(n): 44320128000
• Sum of proper divisors (its aliquot sum) s(n): 23012743335
• 21307384665 is an abundant number, because the sum of its proper divisors (23012743335) is greater than itself. Its abundance is 1705358670

Bases of 21307384665

• Binary: 10011110110000001001110001101011001₂
• Hexadecimal: 0x4F604E359
• Base-36: 9SDV789

Squares and roots of 21307384665

• 21307384665 squared (21307384665²) is 454004641262277162225
• 21307384665 cubed (21307384665³) is 9673651531070670649372682279625
• The square root of 21307384665 is 145970.4924462475
• The cube root of 21307384665 is 2772.3201535637

Scales and comparisons

• 21,307,384,665 seconds is equal to 677 years, 26 weeks, 3 days, 5 hours, 57 minutes, 45 seconds.
• To count from 1 to 21,307,384,665 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 21307384665 cubic inches would be around 231 feet tall.

Recreational maths with 21307384665

• 21307384665 backwards is 56648370312
• 21307384665 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21307384665's digits is 45
• More coming soon!