18311281989

Names of 18311281989

• Cardinal: 18311281989 can be written as Eighteen billion, three hundred eleven million, two hundred eighty-one thousand, nine hundred eighty-nine.

Scientific notation

• Scientific notation: 1.8311281989 × 10¹⁰

Factors of 18311281989

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 42675

Divisors of 18311281989

• Number of divisors d(n): 72
• Complete list of divisors:
  1 3 7 11 13 21 33 39 77 91 121 143 169 231 273 363 429 507 847 1001 1183 1573 1859 2541 3003 3549 4719 5577 11011 13013 20449 33033 39039 42641 61347 127923 143143 298487 429429 469051 554333 895461 1407153 1662999 3283357 3880331 5159561 6097663 7206329 9850071 11640993 15478683 18292989 21618987 36116927 42683641 50444303 67074293 79269619 108350781 128050923 151332909 201222879 237808857 469520051 554887333 871965809 1408560153 1664661999 2615897427 6103760663 18311281989
• Sum of all divisors σ(n): 33211636416
• Sum of proper divisors (its aliquot sum) s(n): 14900354427
• 18311281989 is a deficient number, because the sum of its proper divisors (14900354427) is less than itself. Its deficiency is 3410927562

Bases of 18311281989

• Binary: 10001000011011011111111110101000101₂
• Hexadecimal: 0x4436FFD45
• Base-36: 8EU2BLX

Squares and roots of 18311281989

• 18311281989 squared (18311281989²) is 335303048080675796121
• 18311281989 cubed (18311281989³) is 6139828665176479724458703364669
• The square root of 18311281989 is 135319.1855909575
• The cube root of 18311281989 is 2635.7623507971

Scales and comparisons

• 18,311,281,989 seconds is equal to 582 years, 12 weeks, 4 days, 3 hours, 13 minutes, 9 seconds.
• To count from 1 to 18,311,281,989 would take you about one thousand, one hundred sixty-four years!

  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 18311281989 cubic inches would be around 219.6 feet tall.

Recreational maths with 18311281989

• 18311281989 backwards is 98918211381
• The number of decimal digits it has is: 11
• The sum of 18311281989's digits is 51
• More coming soon!