21456909929

Names of 21456909929

• Cardinal: 21456909929 can be written as Twenty-one billion, four hundred fifty-six million, nine hundred nine thousand, nine hundred twenty-nine.

Scientific notation

• Scientific notation: 2.1456909929 × 10¹⁰

Factors of 21456909929

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 328

Divisors of 21456909929

• Number of divisors d(n): 96
• Complete list of divisors:
  1 7 13 49 67 71 73 91 97 469 497 511 637 679 871 923 949 1261 3283 3479 3577 4753 4757 4891 5183 6097 6461 6499 6643 6887 7081 8827 33299 34237 36281 42679 45227 45493 46501 48209 49567 61789 61841 63583 67379 84487 89531 92053 233093 239659 253967 318451 337463 346969 347261 432887 445081 461429 471653 474427 502751 591409 626717 644371 2430827 3030209 3115567 3230003 3301571 3320989 3519257 4139863 4387019 4510597 4514393 5998577 6167551 6535763 17015789 22610021 23246923 24634799 31600751 33684317 41990039 43172857 45750341 221205257 235790219 293930273 302209999 320252387 437896121 1650531533 3065272847 21456909929
• Sum of all divisors σ(n): 28333622016
• Sum of proper divisors (its aliquot sum) s(n): 6876712087
• 21456909929 is a deficient number, because the sum of its proper divisors (6876712087) is less than itself. Its deficiency is 14580197842

Bases of 21456909929

• Binary: 10011111110111011100111011001101001₂
• Hexadecimal: 0x4FEEE7669
• Base-36: 9UUW1NT

Squares and roots of 21456909929

• 21456909929 squared (21456909929²) is 460398983701218785041
• 21456909929 cubed (21456909929³) is 9878739524680190518147549572089
• The square root of 21456909929 is 146481.7733678837
• The cube root of 21456909929 is 2778.7899918919

Scales and comparisons

• 21,456,909,929 seconds is equal to 682 years, 13 weeks, 4 days, 20 hours, 45 minutes, 29 seconds.
• To count from 1 to 21,456,909,929 would take you about one thousand, three hundred sixty-four 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 21456909929 cubic inches would be around 231.6 feet tall.

Recreational maths with 21456909929

• 21456909929 backwards is 92990965412
• The number of decimal digits it has is: 11
• The sum of 21456909929's digits is 56
• More coming soon!