21948821

Names of 21948821

• Cardinal: 21948821 can be written as Twenty-one million, nine hundred forty-eight thousand, eight hundred twenty-one.

Scientific notation

• Scientific notation: 2.1948821 × 10⁷

Factors of 21948821

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 21948821

Divisors of 21948821

• Number of divisors d(n): 2
• Complete list of divisors:
  1 21948821
• Sum of all divisors σ(n): 21948822
• Sum of proper divisors (its aliquot sum) s(n): 1
• 21948821 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 21948820

Bases of 21948821

• Binary: 1010011101110100110010101₂
• Hexadecimal: 0x14EE995
• Base-36: D2FTH

Squares and roots of 21948821

• 21948821 squared (21948821²) is 481750743290041
• 21948821 cubed (21948821³) is 10573860831090060991661
• The square root of 21948821 is 4684.9568834729
• The cube root of 21948821 is 279.9864831911

Scales and comparisons

• 21,948,821 seconds is equal to 36 weeks, 2 days, 53 minutes, 41 seconds.
• To count from 1 to 21,948,821 would take you about two 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 21948821 cubic inches would be around 23.3 feet tall.

Recreational maths with 21948821

• 21948821 backwards is 12884912
• The number of decimal digits it has is: 8
• The sum of 21948821's digits is 35
• More coming soon!