21494642

Names of 21494642

• Cardinal: 21494642 can be written as Twenty-one million, four hundred ninety-four thousand, six hundred forty-two.

Scientific notation

• Scientific notation: 2.1494642 × 10⁷

Factors of 21494642

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 826732

Divisors of 21494642

• Number of divisors d(n): 8
• Complete list of divisors:
  1 2 13 26 826717 1653434 10747321 21494642
• Sum of all divisors σ(n): 34722156
• Sum of proper divisors (its aliquot sum) s(n): 13227514
• 21494642 is a deficient number, because the sum of its proper divisors (13227514) is less than itself. Its deficiency is 8267128

Bases of 21494642

• Binary: 1010001111111101101110010₂
• Hexadecimal: 0x147FB72
• Base-36: CSPDE

Squares and roots of 21494642

• 21494642 squared (21494642²) is 462019634708164
• 21494642 cubed (21494642³) is 9930946645022759657288
• The square root of 21494642 is 4636.2314437483
• The cube root of 21494642 is 278.0417876213

Scales and comparisons

• 21,494,642 seconds is equal to 35 weeks, 3 days, 18 hours, 44 minutes, 2 seconds.
• To count from 1 to 21,494,642 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 21494642 cubic inches would be around 23.2 feet tall.

Recreational maths with 21494642

• 21494642 backwards is 24649412
• The number of decimal digits it has is: 8
• The sum of 21494642's digits is 32
• More coming soon!