21408557

Names of 21408557

• Cardinal: 21408557 can be written as Twenty-one million, four hundred eight thousand, five hundred fifty-seven.

Scientific notation

• Scientific notation: 2.1408557 × 10⁷

Factors of 21408557

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 21408557

Divisors of 21408557

• Number of divisors d(n): 2
• Complete list of divisors:
  1 21408557
• Sum of all divisors σ(n): 21408558
• Sum of proper divisors (its aliquot sum) s(n): 1
• 21408557 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 21408556

Bases of 21408557

• Binary: 1010001101010101100101101₂
• Hexadecimal: 0x146AB2D
• Base-36: CQUY5

Squares and roots of 21408557

• 21408557 squared (21408557²) is 458326312822249
• 21408557 cubed (21408557³) is 9812104992654948584693
• The square root of 21408557 is 4626.9381884787
• The cube root of 21408557 is 277.6701096979

Scales and comparisons

• 21,408,557 seconds is equal to 35 weeks, 2 days, 18 hours, 49 minutes, 17 seconds.
• To count from 1 to 21,408,557 would take you about sixteen 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 21408557 cubic inches would be around 23.1 feet tall.

Recreational maths with 21408557

• 21408557 backwards is 75580412
• The number of decimal digits it has is: 8
• The sum of 21408557's digits is 32
• More coming soon!