21020907

Names of 21020907

• Cardinal: 21020907 can be written as Twenty-one million, twenty thousand, nine hundred seven.

Scientific notation

• Scientific notation: 2.1020907 × 10⁷

Factors of 21020907

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 7006972

Divisors of 21020907

• Number of divisors d(n): 4
• Complete list of divisors:
  1 3 7006969 21020907
• Sum of all divisors σ(n): 28027880
• Sum of proper divisors (its aliquot sum) s(n): 7006973
• 21020907 is a deficient number, because the sum of its proper divisors (7006973) is less than itself. Its deficiency is 14013934

Bases of 21020907

• Binary: 1010000001100000011101011₂
• Hexadecimal: 0x140C0EB
• Base-36: CIJU3

Squares and roots of 21020907

• 21020907 squared (21020907²) is 441878531102649
• 21020907 cubed (21020907³) is 9288687507605392082643
• The square root of 21020907 is 4584.8562681943
• The cube root of 21020907 is 275.9839441405

Scales and comparisons

• 21,020,907 seconds is equal to 34 weeks, 5 days, 7 hours, 8 minutes, 27 seconds.
• To count from 1 to 21,020,907 would take you about twenty-two hours!

  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 21020907 cubic inches would be around 23 feet tall.

Recreational maths with 21020907

• 21020907 backwards is 70902012
• The number of decimal digits it has is: 8
• The sum of 21020907's digits is 21
• More coming soon!