18358421

Names of 18358421

• Cardinal: 18358421 can be written as Eighteen million, three hundred fifty-eight thousand, four hundred twenty-one.

Scientific notation

• Scientific notation: 1.8358421 × 10⁷

Factors of 18358421

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 2343

Divisors of 18358421

• Number of divisors d(n): 8
• Complete list of divisors:
  1 29 317 1997 9193 57913 633049 18358421
• Sum of all divisors σ(n): 19060920
• Sum of proper divisors (its aliquot sum) s(n): 702499
• 18358421 is a deficient number, because the sum of its proper divisors (702499) is less than itself. Its deficiency is 17655922

Bases of 18358421

• Binary: 1000110000010000010010101₂
• Hexadecimal: 0x1182095
• Base-36: AXHG5

Squares and roots of 18358421

• 18358421 squared (18358421²) is 337031621613241
• 18358421 cubed (18358421³) is 6187368399888577452461
• The square root of 18358421 is 4284.6727996429
• The cube root of 18358421 is 263.8022173741

Scales and comparisons

• 18,358,421 seconds is equal to 30 weeks, 2 days, 11 hours, 33 minutes, 41 seconds.
• To count from 1 to 18,358,421 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 18358421 cubic inches would be around 22 feet tall.

Recreational maths with 18358421

• 18358421 backwards is 12485381
• The number of decimal digits it has is: 8
• The sum of 18358421's digits is 32
• More coming soon!