21809349

Names of 21809349

• Cardinal: 21809349 can be written as Twenty-one million, eight hundred nine thousand, three hundred forty-nine.

Scientific notation

• Scientific notation: 2.1809349 × 10⁷

Factors of 21809349

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 5541

Divisors of 21809349

• Number of divisors d(n): 12
• Complete list of divisors:
  1 3 9 479 1437 4311 5059 15177 45531 2423261 7269783 21809349
• Sum of all divisors σ(n): 31574400
• Sum of proper divisors (its aliquot sum) s(n): 9765051
• 21809349 is a deficient number, because the sum of its proper divisors (9765051) is less than itself. Its deficiency is 12044298

Bases of 21809349

• Binary: 1010011001100100011000101₂
• Hexadecimal: 0x14CC8C5
• Base-36: CZG79

Squares and roots of 21809349

• 21809349 squared (21809349²) is 475647703803801
• 21809349 cubed (21809349³) is 10373566773305723535549
• The square root of 21809349 is 4670.0480725579
• The cube root of 21809349 is 279.3921721199

Scales and comparisons

• 21,809,349 seconds is equal to 36 weeks, 10 hours, 9 minutes, 9 seconds.
• To count from 1 to 21,809,349 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 21809349 cubic inches would be around 23.3 feet tall.

Recreational maths with 21809349

• 21809349 backwards is 94390812
• The number of decimal digits it has is: 8
• The sum of 21809349's digits is 36
• More coming soon!