21047397

Names of 21047397

• Cardinal: 21047397 can be written as Twenty-one million, forty-seven thousand, three hundred ninety-seven.

Scientific notation

• Scientific notation: 2.1047397 × 10⁷

Factors of 21047397

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 1002267

Divisors of 21047397

• Number of divisors d(n): 8
• Complete list of divisors:
  1 3 7 21 1002257 3006771 7015799 21047397
• Sum of all divisors σ(n): 32072256
• Sum of proper divisors (its aliquot sum) s(n): 11024859
• 21047397 is a deficient number, because the sum of its proper divisors (11024859) is less than itself. Its deficiency is 10022538

Bases of 21047397

• Binary: 1010000010010100001100101₂
• Hexadecimal: 0x1412865
• Base-36: CJ49X

Squares and roots of 21047397

• 21047397 squared (21047397²) is 442992920475609
• 21047397 cubed (21047397³) is 9323847865439571439773
• The square root of 21047397 is 4587.7442169327
• The cube root of 21047397 is 276.0998247393

Scales and comparisons

• 21,047,397 seconds is equal to 34 weeks, 5 days, 14 hours, 29 minutes, 57 seconds.
• To count from 1 to 21,047,397 would take you about nine 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 21047397 cubic inches would be around 23 feet tall.

Recreational maths with 21047397

• 21047397 backwards is 79374012
• The number of decimal digits it has is: 8
• The sum of 21047397's digits is 33
• More coming soon!