21423940965

Names of 21423940965

• Cardinal: 21423940965 can be written as Twenty-one billion, four hundred twenty-three million, nine hundred forty thousand, nine hundred sixty-five.

Scientific notation

• Scientific notation: 2.1423940965 × 10¹⁰

Factors of 21423940965

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 3895

Divisors of 21423940965

• Number of divisors d(n): 144
• Complete list of divisors:
  1 3 5 7 9 15 21 27 29 35 45 49 63 87 105 135 145 147 189 203 245 261 315 435 441 609 735 783 841 945 1015 1305 1323 1421 1827 2205 2523 3045 3851 3915 4205 4263 5481 5887 6615 7105 7569 9135 11553 12615 12789 17661 19255 21315 22707 26957 27405 29435 34659 37845 38367 41209 52983 57765 63945 80871 88305 103977 111679 113535 123627 134785 158949 173295 188699 191835 206045 242613 264915 335037 370881 404355 519885 558395 566097 618135 727839 781753 794745 943495 1005111 1112643 1213065 1675185 1698291 1854405 2345259 2830485 3015333 3238691 3639195 3908765 5025555 5094873 5472271 5563215 7035777 8491455 9716073 11726295 15076665 16193455 16416813 21107331 22670837 25474365 27361355 29148219 35178885 48580365 49250439 68012511 82084065 87444657 105536655 113354185 145741095 147751317 158695859 204037533 246252195 340062555 437223285 476087577 612112599 738756585 793479295 1020187665 1428262731 2380437885 3060562995 4284788193 7141313655 21423940965
• Sum of all divisors σ(n): 45897658560
• Sum of proper divisors (its aliquot sum) s(n): 24473717595
• 21423940965 is an abundant number, because the sum of its proper divisors (24473717595) is greater than itself. Its abundance is 3049776630

Bases of 21423940965

• Binary: 10011111100111101110110010101100101₂
• Hexadecimal: 0x4FCF76565
• Base-36: 9UB9EN9

Squares and roots of 21423940965

• 21423940965 squared (21423940965²) is 458985246471805131225
• 21423940965 cubed (21423940965³) is 9833272824217927668348478132125
• The square root of 21423940965 is 146369.1940436923
• The cube root of 21423940965 is 2777.3660405127

Scales and comparisons

• 21,423,940,965 seconds is equal to 681 years, 11 weeks, 1 day, 6 hours, 42 minutes, 45 seconds.
• To count from 1 to 21,423,940,965 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 21423940965 cubic inches would be around 231.4 feet tall.

Recreational maths with 21423940965

• 21423940965 backwards is 56904932412
• 21423940965 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21423940965's digits is 45
• More coming soon!