21980946

Names of 21980946

• Cardinal: 21980946 can be written as Twenty-one million, nine hundred eighty thousand, nine hundred forty-six.

Scientific notation

• Scientific notation: 2.1980946 × 10⁷

Factors of 21980946

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 281825

Divisors of 21980946

• Number of divisors d(n): 16
• Complete list of divisors:
  1 2 3 6 13 26 39 78 281807 563614 845421 1690842 3663491 7326982 10990473 21980946
• Sum of all divisors σ(n): 47343744
• Sum of proper divisors (its aliquot sum) s(n): 25362798
• 21980946 is an abundant number, because the sum of its proper divisors (25362798) is greater than itself. Its abundance is 3381852

Bases of 21980946

• Binary: 1010011110110011100010010₂
• Hexadecimal: 0x14F6712
• Base-36: D34LU

Squares and roots of 21980946

• 21980946 squared (21980946²) is 483161987054916
• 21980946 cubed (21980946³) is 10620357546706807630536
• The square root of 21980946 is 4688.3841566153
• The cube root of 21980946 is 280.1230156741

Scales and comparisons

• 21,980,946 seconds is equal to 36 weeks, 2 days, 9 hours, 49 minutes, 6 seconds.
• To count from 1 to 21,980,946 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 21980946 cubic inches would be around 23.3 feet tall.

Recreational maths with 21980946

• 21980946 backwards is 64908912
• 21980946 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21980946's digits is 39
• More coming soon!