18998821

Names of 18998821

• Cardinal: 18998821 can be written as Eighteen million, nine hundred ninety-eight thousand, eight hundred twenty-one.

Scientific notation

• Scientific notation: 1.8998821 × 10⁷

Factors of 18998821

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 18998821

Divisors of 18998821

• Number of divisors d(n): 2
• Complete list of divisors:
  1 18998821
• Sum of all divisors σ(n): 18998822
• Sum of proper divisors (its aliquot sum) s(n): 1
• 18998821 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 18998820

Bases of 18998821

• Binary: 1001000011110011000100101₂
• Hexadecimal: 0x121E625
• Base-36: BB7L1

Squares and roots of 18998821

• 18998821 squared (18998821²) is 360955199390041
• 18998821 cubed (18998821³) is 6857723222230698141661
• The square root of 18998821 is 4358.7637008675
• The cube root of 18998821 is 266.8346453799

Scales and comparisons

• 18,998,821 seconds is equal to 31 weeks, 2 days, 21 hours, 27 minutes, 1 second.
• To count from 1 to 18,998,821 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 18998821 cubic inches would be around 22.2 feet tall.

Recreational maths with 18998821

• 18998821 backwards is 12889981
• The number of decimal digits it has is: 8
• The sum of 18998821's digits is 46
• More coming soon!