18123105749

Names of 18123105749

• Cardinal: 18123105749 can be written as Eighteen billion, one hundred twenty-three million, one hundred five thousand, seven hundred forty-nine.

Scientific notation

• Scientific notation: 1.8123105749 × 10¹⁰

Factors of 18123105749

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 158

Divisors of 18123105749

• Number of divisors d(n): 72
• Complete list of divisors:
  1 7 19 29 49 103 133 203 343 361 551 721 931 1421 1957 2401 2527 2987 3857 5047 6517 9947 10469 13699 16807 17689 20909 26999 35329 37183 45619 56753 69629 73283 95893 123823 146363 188993 247303 260281 319333 397271 487403 512981 671251 866761 1024541 1078307 1322951 1731121 1821967 2780897 3590867 4698757 6067327 7171787 7548149 9260657 12753769 19466279 25136069 32891299 50202509 52837043 89276383 136263953 175952483 369859301 624934681 953847671 2589015107 18123105749
• Sum of all divisors σ(n): 23308421760
• Sum of proper divisors (its aliquot sum) s(n): 5185316011
• 18123105749 is a deficient number, because the sum of its proper divisors (5185316011) is less than itself. Its deficiency is 12937789738

Bases of 18123105749

• Binary: 10000111000001110001010010111010101₂
• Hexadecimal: 0x43838A5D5
• Base-36: 8BQ11W5

Squares and roots of 18123105749

• 18123105749 squared (18123105749²) is 328446961989436851001
• 18123105749 cubed (18123105749³) is 5952479025072347471648679504749
• The square root of 18123105749 is 134622.0849229427
• The cube root of 18123105749 is 2626.7024239633

Scales and comparisons

• 18,123,105,749 seconds is equal to 576 years, 13 weeks, 3 days, 4 hours, 2 minutes, 29 seconds.
• To count from 1 to 18,123,105,749 would take you about one thousand, one hundred fifty-two 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 18123105749 cubic inches would be around 218.9 feet tall.

Recreational maths with 18123105749

• 18123105749 backwards is 94750132181
• The number of decimal digits it has is: 11
• The sum of 18123105749's digits is 41
• More coming soon!