21216994

Names of 21216994

• Cardinal: 21216994 can be written as Twenty-one million, two hundred sixteen thousand, nine hundred ninety-four.

Scientific notation

• Scientific notation: 2.1216994 × 10⁷

Factors of 21216994

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 461264

Divisors of 21216994

• Number of divisors d(n): 8
• Complete list of divisors:
  1 2 23 46 461239 922478 10608497 21216994
• Sum of all divisors σ(n): 33209280
• Sum of proper divisors (its aliquot sum) s(n): 11992286
• 21216994 is a deficient number, because the sum of its proper divisors (11992286) is less than itself. Its deficiency is 9224708

Bases of 21216994

• Binary: 1010000111011111011100010₂
• Hexadecimal: 0x143BEE2
• Base-36: CMR4Y

Squares and roots of 21216994

• 21216994 squared (21216994²) is 450160834396036
• 21216994 cubed (21216994³) is 9551059722415689435784
• The square root of 21216994 is 4606.1908340841
• The cube root of 21216994 is 276.8394330675

Scales and comparisons

• 21,216,994 seconds is equal to 35 weeks, 13 hours, 36 minutes, 34 seconds.
• To count from 1 to 21,216,994 would take you about four 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 21216994 cubic inches would be around 23.1 feet tall.

Recreational maths with 21216994

• 21216994 backwards is 49961212
• The number of decimal digits it has is: 8
• The sum of 21216994's digits is 34
• More coming soon!