21309841

Names of 21309841

• Cardinal: 21309841 can be written as Twenty-one million, three hundred nine thousand, eight hundred forty-one.

Scientific notation

• Scientific notation: 2.1309841 × 10⁷

Factors of 21309841

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 3711

Divisors of 21309841

• Number of divisors d(n): 8
• Complete list of divisors:
  1 7 1231 2473 8617 17311 3044263 21309841
• Sum of all divisors σ(n): 24383744
• Sum of proper divisors (its aliquot sum) s(n): 3073903
• 21309841 is a deficient number, because the sum of its proper divisors (3073903) is less than itself. Its deficiency is 18235938

Bases of 21309841

• Binary: 1010001010010100110010001₂
• Hexadecimal: 0x1452991
• Base-36: COQS1

Squares and roots of 21309841

• 21309841 squared (21309841²) is 454109323445281
• 21309841 cubed (21309841³) is 9676997479236510310321
• The square root of 21309841 is 4616.2583333261
• The cube root of 21309841 is 277.2426681349

Scales and comparisons

• 21,309,841 seconds is equal to 35 weeks, 1 day, 15 hours, 24 minutes, 1 second.
• To count from 1 to 21,309,841 would take you about five 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 21309841 cubic inches would be around 23.1 feet tall.

Recreational maths with 21309841

• 21309841 backwards is 14890312
• The number of decimal digits it has is: 8
• The sum of 21309841's digits is 28
• More coming soon!