20407985

Names of 20407985

• Cardinal: 20407985 can be written as Twenty million, four hundred seven thousand, nine hundred eighty-five.

Scientific notation

• Scientific notation: 2.0407985 × 10⁷

Factors of 20407985

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 313987

Divisors of 20407985

• Number of divisors d(n): 8
• Complete list of divisors:
  1 5 13 65 313969 1569845 4081597 20407985
• Sum of all divisors σ(n): 26373480
• Sum of proper divisors (its aliquot sum) s(n): 5965495
• 20407985 is a deficient number, because the sum of its proper divisors (5965495) is less than itself. Its deficiency is 14442490

Bases of 20407985

• Binary: 1001101110110011010110001₂
• Hexadecimal: 0x13766B1
• Base-36: C5EWH

Squares and roots of 20407985

• 20407985 squared (20407985²) is 416485851760225
• 20407985 cubed (20407985³) is 8499637015434895396625
• The square root of 20407985 is 4517.5197841293
• The cube root of 20407985 is 273.2750875627

Scales and comparisons

• 20,407,985 seconds is equal to 33 weeks, 5 days, 4 hours, 53 minutes, 5 seconds.
• To count from 1 to 20,407,985 would take you about fifty weeks!

  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 20407985 cubic inches would be around 22.8 feet tall.

Recreational maths with 20407985

• 20407985 backwards is 58970402
• The number of decimal digits it has is: 8
• The sum of 20407985's digits is 35
• More coming soon!