21979993

Names of 21979993

• Cardinal: 21979993 can be written as Twenty-one million, nine hundred seventy-nine thousand, nine hundred ninety-three.

Scientific notation

• Scientific notation: 2.1979993 × 10⁷

Factors of 21979993

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 3671

Divisors of 21979993

• Number of divisors d(n): 8
• Complete list of divisors:
  1 7 1367 2297 9569 16079 3139999 21979993
• Sum of all divisors σ(n): 25149312
• Sum of proper divisors (its aliquot sum) s(n): 3169319
• 21979993 is a deficient number, because the sum of its proper divisors (3169319) is less than itself. Its deficiency is 18810674

Bases of 21979993

• Binary: 1010011110110001101011001₂
• Hexadecimal: 0x14F6359
• Base-36: D33VD

Squares and roots of 21979993

• 21979993 squared (21979993²) is 483120092280049
• 21979993 cubed (21979993³) is 10618976246474831059657
• The square root of 21979993 is 4688.2825213505
• The cube root of 21979993 is 280.1189673027

Scales and comparisons

• 21,979,993 seconds is equal to 36 weeks, 2 days, 9 hours, 33 minutes, 13 seconds.
• To count from 1 to 21,979,993 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 21979993 cubic inches would be around 23.3 feet tall.

Recreational maths with 21979993

• 21979993 backwards is 39997912
• The number of decimal digits it has is: 8
• The sum of 21979993's digits is 49
• More coming soon!