21100628729738991

Names of 21100628729738991

• Cardinal: 21100628729738991 can be written as Twenty-one quadrillion, one hundred trillion, six hundred twenty-eight billion, seven hundred twenty-nine million, seven hundred thirty-eight thousand, nine hundred ninety-one.

Scientific notation

• Scientific notation: 2.1100628729738991 × 10¹⁶

Factors of 21100628729738991

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 13493927

Divisors of 21100628729738991

• Number of divisors d(n): 32
• Complete list of divisors:
  1 3 29 87 281 843 8149 24447 64271 192813 1863859 5591577 13429343 18060151 40288029 54180453 389450947 523744379 1168352841 1571233137 3773645383 11320936149 109435716107 328307148321 863117303953 2589351911859 25030401814637 75091205443911 242535962410793 727607887232379 7033542909912997 21100628729738991
• Sum of all divisors σ(n): 29208346189701120
• Sum of proper divisors (its aliquot sum) s(n): 8107717459962129
• 21100628729738991 is a deficient number, because the sum of its proper divisors (8107717459962129) is less than itself. Its deficiency is 12992911269776862

Bases of 21100628729738991

• Binary: 1001010111101101110100011110111111110010011011011101111₂
• Hexadecimal: 0x4AF6E8F7F936EF
• Base-36: 5RRJR0NLIB3

Squares and roots of 21100628729738991

• 21100628729738991 squared (21100628729738991²) is 445236532790286504891690985698081
• 21100628729738991 cubed (21100628729738991³) is 9394770775324095747861840460747671681981059576271
• The square root of 21100628729738991 is 145260554.6242302869
• The cube root of 21100628729738991 is 276332.3934533043

Scales and comparisons

• 21,100,628,729,738,991 seconds is equal to 670,934,725 years, 3 weeks, 6 days, 12 hours, 49 minutes, 51 seconds.
• To count from 1 to 21,100,628,729,738,991 would take you about two billion, twelve million, eight hundred four thousand, one hundred seventy-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 21100628729738991 cubic inches would be around 23027.7 feet tall.

Recreational maths with 21100628729738991

• 21100628729738991 backwards is 19983792782600112
• The number of decimal digits it has is: 17
• The sum of 21100628729738991's digits is 75
• More coming soon!