21123712

Names of 21123712

• Cardinal: 21123712 can be written as Twenty-one million, one hundred twenty-three thousand, seven hundred twelve.

Scientific notation

• Scientific notation: 2.1123712 × 10⁷

Factors of 21123712

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 956

Divisors of 21123712

• Number of divisors d(n): 32
• Complete list of divisors:
  1 2 4 8 16 32 64 128 227 454 727 908 1454 1816 2908 3632 5816 7264 11632 14528 23264 29056 46528 93056 165029 330058 660116 1320232 2640464 5280928 10561856 21123712
• Sum of all divisors σ(n): 42325920
• Sum of proper divisors (its aliquot sum) s(n): 21202208
• 21123712 is an abundant number, because the sum of its proper divisors (21202208) is greater than itself. Its abundance is 78496

Bases of 21123712

• Binary: 1010000100101001010000000₂
• Hexadecimal: 0x1425280
• Base-36: CKR5S

Squares and roots of 21123712

• 21123712 squared (21123712²) is 446211208658944
• 21123712 cubed (21123712³) is 9425637062883439280128
• The square root of 21123712 is 4596.0539596485
• The cube root of 21123712 is 276.4331223749

Scales and comparisons

• 21,123,712 seconds is equal to 34 weeks, 6 days, 11 hours, 41 minutes, 52 seconds.
• To count from 1 to 21,123,712 would take you about two days!

  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 21123712 cubic inches would be around 23 feet tall.

Recreational maths with 21123712

• 21123712 backwards is 21732112
• The number of decimal digits it has is: 8
• The sum of 21123712's digits is 19
• More coming soon!