21499979

Names of 21499979

• Cardinal: 21499979 can be written as Twenty-one million, four hundred ninety-nine thousand, nine hundred seventy-nine.

Scientific notation

• Scientific notation: 2.1499979 × 10⁷

Factors of 21499979

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 21499979

Divisors of 21499979

• Number of divisors d(n): 2
• Complete list of divisors:
  1 21499979
• Sum of all divisors σ(n): 21499980
• Sum of proper divisors (its aliquot sum) s(n): 1
• 21499979 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 21499978

Bases of 21499979

• Binary: 1010010000001000001001011₂
• Hexadecimal: 0x148104B
• Base-36: CSTHN

Squares and roots of 21499979

• 21499979 squared (21499979²) is 462249097000441
• 21499979 cubed (21499979³) is 9938345878278444490739
• The square root of 21499979 is 4636.8069832591
• The cube root of 21499979 is 278.0647977933

Scales and comparisons

• 21,499,979 seconds is equal to 35 weeks, 3 days, 20 hours, 12 minutes, 59 seconds.
• To count from 1 to 21,499,979 would take you about two 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 21499979 cubic inches would be around 23.2 feet tall.

Recreational maths with 21499979

• 21499979 backwards is 97999412
• 21499979 is a twin prime! Its twin is 21499981
• The number of decimal digits it has is: 8
• The sum of 21499979's digits is 50
• More coming soon!