21491941

Names of 21491941

• Cardinal: 21491941 can be written as Twenty-one million, four hundred ninety-one thousand, nine hundred forty-one.

Scientific notation

• Scientific notation: 2.1491941 × 10⁷

Factors of 21491941

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 21491941

Divisors of 21491941

• Number of divisors d(n): 2
• Complete list of divisors:
  1 21491941
• Sum of all divisors σ(n): 21491942
• Sum of proper divisors (its aliquot sum) s(n): 1
• 21491941 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 21491940

Bases of 21491941

• Binary: 1010001111111000011100101₂
• Hexadecimal: 0x147F0E5
• Base-36: CSNAD

Squares and roots of 21491941

• 21491941 squared (21491941²) is 461903527947481
• 21491941 cubed (21491941³) is 9927203370339112750621
• The square root of 21491941 is 4635.9401419777
• The cube root of 21491941 is 278.0301409619

Scales and comparisons

• 21,491,941 seconds is equal to 35 weeks, 3 days, 17 hours, 59 minutes, 1 second.
• To count from 1 to 21,491,941 would take you about two 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 21491941 cubic inches would be around 23.2 feet tall.

Recreational maths with 21491941

• 21491941 backwards is 14919412
• The number of decimal digits it has is: 8
• The sum of 21491941's digits is 31
• More coming soon!