18420442

Names of 18420442

• Cardinal: 18420442 can be written as Eighteen million, four hundred twenty thousand, four hundred forty-two.

Scientific notation

• Scientific notation: 1.8420442 × 10⁷

Factors of 18420442

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 9210223

Divisors of 18420442

• Number of divisors d(n): 4
• Complete list of divisors:
  1 2 9210221 18420442
• Sum of all divisors σ(n): 27630666
• Sum of proper divisors (its aliquot sum) s(n): 9210224
• 18420442 is a deficient number, because the sum of its proper divisors (9210224) is less than itself. Its deficiency is 9210218

Bases of 18420442

• Binary: 1000110010001001011011010₂
• Hexadecimal: 0x11912DA
• Base-36: AYTAY

Squares and roots of 18420442

• 18420442 squared (18420442²) is 339312683475364
• 18420442 cubed (18420442³) is 6250289605822300990888
• The square root of 18420442 is 4291.9042393791
• The cube root of 18420442 is 264.0989547163

Scales and comparisons

• 18,420,442 seconds is equal to 30 weeks, 3 days, 4 hours, 47 minutes, 22 seconds.
• To count from 1 to 18,420,442 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 18420442 cubic inches would be around 22 feet tall.

Recreational maths with 18420442

• 18420442 backwards is 24402481
• The number of decimal digits it has is: 8
• The sum of 18420442's digits is 25
• More coming soon!