21312907

Names of 21312907

• Cardinal: 21312907 can be written as Twenty-one million, three hundred twelve thousand, nine hundred seven.

Scientific notation

• Scientific notation: 2.1312907 × 10⁷

Factors of 21312907

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 259

Divisors of 21312907

• Number of divisors d(n): 32
• Complete list of divisors:
  1 7 11 41 43 77 157 287 301 451 473 1099 1727 1763 3157 3311 6437 6751 12089 12341 19393 45059 47257 70807 74261 135751 276791 495649 519827 1937537 3044701 21312907
• Sum of all divisors σ(n): 28030464
• Sum of proper divisors (its aliquot sum) s(n): 6717557
• 21312907 is a deficient number, because the sum of its proper divisors (6717557) is less than itself. Its deficiency is 14595350

Bases of 21312907

• Binary: 1010001010011010110001011₂
• Hexadecimal: 0x145358B
• Base-36: COT57

Squares and roots of 21312907

• 21312907 squared (21312907²) is 454240004790649
• 21312907 cubed (21312907³) is 9681174977782656606643
• The square root of 21312907 is 4616.5904085157
• The cube root of 21312907 is 277.2559637955

Scales and comparisons

• 21,312,907 seconds is equal to 35 weeks, 1 day, 16 hours, 15 minutes, 7 seconds.
• To count from 1 to 21,312,907 would take you about six 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 21312907 cubic inches would be around 23.1 feet tall.

Recreational maths with 21312907

• 21312907 backwards is 70921312
• The number of decimal digits it has is: 8
• The sum of 21312907's digits is 25
• More coming soon!