18420121

Names of 18420121

• Cardinal: 18420121 can be written as Eighteen million, four hundred twenty thousand, one hundred twenty-one.

Scientific notation

• Scientific notation: 1.8420121 × 10⁷

Factors of 18420121

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 23578

Divisors of 18420121

• Number of divisors d(n): 4
• Complete list of divisors:
  1 809 22769 18420121
• Sum of all divisors σ(n): 18443700
• Sum of proper divisors (its aliquot sum) s(n): 23579
• 18420121 is a deficient number, because the sum of its proper divisors (23579) is less than itself. Its deficiency is 18396542

Bases of 18420121

• Binary: 1000110010001000110011001₂
• Hexadecimal: 0x1191199
• Base-36: AYT21

Squares and roots of 18420121

• 18420121 squared (18420121²) is 339300857654641
• 18420121 cubed (18420121³) is 6249962853402263431561
• The square root of 18420121 is 4291.8668432281
• The cube root of 18420121 is 264.0974206189

Scales and comparisons

• 18,420,121 seconds is equal to 30 weeks, 3 days, 4 hours, 42 minutes, 1 second.
• To count from 1 to 18,420,121 would take you about forty-five 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 18420121 cubic inches would be around 22 feet tall.

Recreational maths with 18420121

• 18420121 backwards is 12102481
• The number of decimal digits it has is: 8
• The sum of 18420121's digits is 19
• More coming soon!