21123032847

Names of 21123032847

• Cardinal: 21123032847 can be written as Twenty-one billion, one hundred twenty-three million, thirty-two thousand, eight hundred forty-seven.

Scientific notation

• Scientific notation: 2.1123032847 × 10¹⁰

Factors of 21123032847

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 2901

Divisors of 21123032847

• Number of divisors d(n): 72
• Complete list of divisors:
  1 3 7 21 29 49 61 87 147 183 203 427 609 841 1281 1421 1769 2523 2801 2989 4263 5307 5887 8403 8967 12383 17661 19607 37149 41209 51301 58821 81229 86681 123627 137249 153903 170861 243687 260043 359107 411747 512583 568603 1077321 1196027 1705809 2355641 2513749 3588081 3980221 4954969 7066923 7541247 8372189 11940663 14864907 16489487 25116567 34684783 49468461 104054349 115426409 143694101 242793481 346279227 431082303 728380443 1005858707 3017576121 7041010949 21123032847
• Sum of all divisors σ(n): 34499501712
• Sum of proper divisors (its aliquot sum) s(n): 13376468865
• 21123032847 is a deficient number, because the sum of its proper divisors (13376468865) is less than itself. Its deficiency is 7746563982

Bases of 21123032847

• Binary: 10011101011000001111110011100001111₂
• Hexadecimal: 0x4EB07E70F
• Base-36: 9PC3WGF

Squares and roots of 21123032847

• 21123032847 squared (21123032847²) is 446182516655440925409
• 21123032847 cubed (21123032847³) is 9424727955070003248682383909423
• The square root of 21123032847 is 145337.6511678925
• The cube root of 21123032847 is 2764.3015978961

Scales and comparisons

• 21,123,032,847 seconds is equal to 671 years, 33 weeks, 4 days, 13 hours, 7 minutes, 27 seconds.
• To count from 1 to 21,123,032,847 would take you about one thousand, three hundred forty-three 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 21123032847 cubic inches would be around 230.4 feet tall.

Recreational maths with 21123032847

• 21123032847 backwards is 74823032112
• The number of decimal digits it has is: 11
• The sum of 21123032847's digits is 33
• More coming soon!