21009984605018

Names of 21009984605018

• Cardinal: 21009984605018 can be written as Twenty-one trillion, nine billion, nine hundred eighty-four million, six hundred five thousand and eighteen.

Scientific notation

• Scientific notation: 2.1009984605018 × 10¹³

Factors of 21009984605018

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 8962256

Divisors of 21009984605018

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 17 19 34 38 191 323 361 382 646 722 3247 3629 6137 6494 7258 12274 61693 68951 123386 137902 1172167 2344334 8962027 17924054 152354459 170278513 304708918 340557026 1711747157 2894734721 3235291747 3423494314 5789469442 6470583494 29099701669 32523195983 54999959699 58199403338 65046391966 109999919398 552894331711 617940723677 1105788663422 1235881447354 10504992302509 21009984605018
• Sum of all divisors σ(n): 35401874701824
• Sum of proper divisors (its aliquot sum) s(n): 14391890096806
• 21009984605018 is a deficient number, because the sum of its proper divisors (14391890096806) is less than itself. Its deficiency is 6618094508212

Bases of 21009984605018

• Binary: 100110001101111000100101010110100101101011010₂
• Hexadecimal: 0x131BC4AB4B5A
• Base-36: 7G3UQDE8Q

Squares and roots of 21009984605018

• 21009984605018 squared (21009984605018²) is 441419453103093365470780324
• 21009984605018 cubed (21009984605018³) is 9274215914051456636574588865155386065832
• The square root of 21009984605018 is 4583664.9752155753
• The cube root of 21009984605018 is 27593.6135738997

Scales and comparisons

• 21,009,984,605,018 seconds is equal to 668,052 years, 27 weeks, 1 day, 2 hours, 43 minutes, 38 seconds.
• To count from 1 to 21,009,984,605,018 would take you about one million, six hundred seventy thousand, one hundred thirty-one 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 21009984605018 cubic inches would be around 2299.5 feet tall.

Recreational maths with 21009984605018

• 21009984605018 backwards is 81050648990012
• The number of decimal digits it has is: 14
• The sum of 21009984605018's digits is 53
• More coming soon!