21991713

Names of 21991713

• Cardinal: 21991713 can be written as Twenty-one million, nine hundred ninety-one thousand, seven hundred thirteen.

Scientific notation

• Scientific notation: 2.1991713 × 10⁷

Factors of 21991713

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 7330574

Divisors of 21991713

• Number of divisors d(n): 4
• Complete list of divisors:
  1 3 7330571 21991713
• Sum of all divisors σ(n): 29322288
• Sum of proper divisors (its aliquot sum) s(n): 7330575
• 21991713 is a deficient number, because the sum of its proper divisors (7330575) is less than itself. Its deficiency is 14661138

Bases of 21991713

• Binary: 1010011111001000100100001₂
• Hexadecimal: 0x14F9121
• Base-36: D3CWX

Squares and roots of 21991713

• 21991713 squared (21991713²) is 483635440674369
• 21991713 cubed (21991713³) is 10635971807939249504097
• The square root of 21991713 is 4689.5322794497
• The cube root of 21991713 is 280.1687460715

Scales and comparisons

• 21,991,713 seconds is equal to 36 weeks, 2 days, 12 hours, 48 minutes, 33 seconds.
• To count from 1 to 21,991,713 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 21991713 cubic inches would be around 23.3 feet tall.

Recreational maths with 21991713

• 21991713 backwards is 31719912
• The number of decimal digits it has is: 8
• The sum of 21991713's digits is 33
• More coming soon!