21472745

Names of 21472745

• Cardinal: 21472745 can be written as Twenty-one million, four hundred seventy-two thousand, seven hundred forty-five.

Scientific notation

• Scientific notation: 2.1472745 × 10⁷

Factors of 21472745

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 613519

Divisors of 21472745

• Number of divisors d(n): 8
• Complete list of divisors:
  1 5 7 35 613507 3067535 4294549 21472745
• Sum of all divisors σ(n): 29448384
• Sum of proper divisors (its aliquot sum) s(n): 7975639
• 21472745 is a deficient number, because the sum of its proper divisors (7975639) is less than itself. Its deficiency is 13497106

Bases of 21472745

• Binary: 1010001111010010111101001₂
• Hexadecimal: 0x147A5E9
• Base-36: CS8H5

Squares and roots of 21472745

• 21472745 squared (21472745²) is 461078777835025
• 21472745 cubed (21472745³) is 9900627021363143893625
• The square root of 21472745 is 4633.8693335053
• The cube root of 21472745 is 277.9473400593

Scales and comparisons

• 21,472,745 seconds is equal to 35 weeks, 3 days, 12 hours, 39 minutes, 5 seconds.
• To count from 1 to 21,472,745 would take you about eighteen hours!

  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 21472745 cubic inches would be around 23.2 feet tall.

Recreational maths with 21472745

• 21472745 backwards is 54727412
• The number of decimal digits it has is: 8
• The sum of 21472745's digits is 32
• More coming soon!