21144509

Names of 21144509

• Cardinal: 21144509 can be written as Twenty-one million, one hundred forty-four thousand, five hundred nine.

Scientific notation

• Scientific notation: 2.1144509 × 10⁷

Factors of 21144509

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 13839

Divisors of 21144509

• Number of divisors d(n): 8
• Complete list of divisors:
  1 29 53 1537 13757 398953 729121 21144509
• Sum of all divisors σ(n): 22287960
• Sum of proper divisors (its aliquot sum) s(n): 1143451
• 21144509 is a deficient number, because the sum of its proper divisors (1143451) is less than itself. Its deficiency is 20001058

Bases of 21144509

• Binary: 1010000101010001110111101₂
• Hexadecimal: 0x142A3BD
• Base-36: CL77H

Squares and roots of 21144509

• 21144509 squared (21144509²) is 447090260851081
• 21144509 cubed (21144509³) is 9453504044378029864229
• The square root of 21144509 is 4598.3158873657
• The cube root of 21144509 is 276.5238118331

Scales and comparisons

• 21,144,509 seconds is equal to 34 weeks, 6 days, 17 hours, 28 minutes, 29 seconds.
• To count from 1 to 21,144,509 would take you about three 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 21144509 cubic inches would be around 23 feet tall.

Recreational maths with 21144509

• 21144509 backwards is 90544112
• The number of decimal digits it has is: 8
• The sum of 21144509's digits is 26
• More coming soon!