18236613978

Names of 18236613978

• Cardinal: 18236613978 can be written as Eighteen billion, two hundred thirty-six million, six hundred thirteen thousand, nine hundred seventy-eight.

Scientific notation

• Scientific notation: 1.8236613978 × 10¹⁰

Factors of 18236613978

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 238

Divisors of 18236613978

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 6 9 11 18 22 33 66 71 99 121 142 151 198 213 242 302 363 426 453 639 726 781 906 1089 1278 1331 1359 1562 1661 2178 2343 2662 2718 3322 3993 4686 4983 5041 7029 7986 8591 9966 10082 10721 11979 14058 14949 15123 17182 18271 21442 23958 25773 29898 30246 32163 36542 45369 51546 54813 55451 64326 77319 90738 94501 96489 109626 110902 117931 154638 164439 166353 189002 192978 200981 235862 283503 328878 332706 353793 401962 499059 567006 602943 609961 707586 761191 850509 998118 1061379 1205886 1219922 1297241 1522382 1701018 1808829 1829883 2122758 2283573 2594482 3617658 3659766 3891723 4567146 5489649 6709571 6850719 7783446 8373101 10979298 11675169 13419142 13701438 14269651 16746202 20128713 23350338 25119303 28539302 40257426 42808953 50238606 60386139 75357909 85617906 92104111 120772278 128426859 150715818 184208222 256853718 276312333 552624666 828936999 1013145221 1657873998 2026290442 3039435663 6078871326 9118306989 18236613978
• Sum of all divisors σ(n): 44373640896
• Sum of proper divisors (its aliquot sum) s(n): 26137026918
• 18236613978 is an abundant number, because the sum of its proper divisors (26137026918) is greater than itself. Its abundance is 7900412940

Bases of 18236613978

• Binary: 10000111110111111001010010101011010₂
• Hexadecimal: 0x43EFCA55A
• Base-36: 8DLLXEI

Squares and roots of 18236613978

• 18236613978 squared (18236613978²) is 332574089382584984484
• 18236613978 cubed (18236613978³) is 6065025287155070717813827517352
• The square root of 18236613978 is 135043.0078826741
• The cube root of 18236613978 is 2632.1748494387

Scales and comparisons

• 18,236,613,978 seconds is equal to 579 years, 45 weeks, 22 hours, 6 minutes, 18 seconds.
• To count from 1 to 18,236,613,978 would take you about one thousand, one hundred fifty-nine 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 18236613978 cubic inches would be around 219.3 feet tall.

Recreational maths with 18236613978

• 18236613978 backwards is 87931663281
• The number of decimal digits it has is: 11
• The sum of 18236613978's digits is 54
• More coming soon!