18988981

Names of 18988981

• Cardinal: 18988981 can be written as Eighteen million, nine hundred eighty-eight thousand, nine hundred eighty-one.

Scientific notation

• Scientific notation: 1.8988981 × 10⁷

Factors of 18988981

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 2651

Divisors of 18988981

• Number of divisors d(n): 8
• Complete list of divisors:
  1 11 1193 1447 13123 15917 1726271 18988981
• Sum of all divisors σ(n): 20746944
• Sum of proper divisors (its aliquot sum) s(n): 1757963
• 18988981 is a deficient number, because the sum of its proper divisors (1757963) is less than itself. Its deficiency is 17231018

Bases of 18988981

• Binary: 1001000011011111110110101₂
• Hexadecimal: 0x121BFB5
• Base-36: BAZZP

Squares and roots of 18988981

• 18988981 squared (18988981²) is 360581399418361
• 18988981 cubed (18988981³) is 6847073342508668080141
• The square root of 18988981 is 4357.6347942433
• The cube root of 18988981 is 266.7885704797

Scales and comparisons

• 18,988,981 seconds is equal to 31 weeks, 2 days, 18 hours, 43 minutes, 1 second.
• To count from 1 to 18,988,981 would take you about forty-seven 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 18988981 cubic inches would be around 22.2 feet tall.

Recreational maths with 18988981

• 18988981 is the same when its digits are reversed! That makes it a palindromic number.
• The number of decimal digits it has is: 8
• The sum of 18988981's digits is 52
• More coming soon!