18179926821

Names of 18179926821

• Cardinal: 18179926821 can be written as Eighteen billion, one hundred seventy-nine million, nine hundred twenty-six thousand, eight hundred twenty-one.

Scientific notation

• Scientific notation: 1.8179926821 × 10¹⁰

Factors of 18179926821

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 1055

Divisors of 18179926821

• Number of divisors d(n): 80
• Complete list of divisors:
  1 3 7 9 21 27 63 81 189 233 241 567 571 699 723 1631 1687 1713 2097 2169 3997 4893 5061 5139 6291 6507 11991 14679 15183 15417 18873 19521 35973 44037 45549 46251 56153 107919 132111 133043 136647 137611 168459 323757 393071 399129 412833 505377 931301 963277 1179213 1197387 1238499 1516131 2793903 2889831 3537639 3592161 3715497 4548393 8381709 8669493 10612917 10776483 11146491 25145127 26008479 31838751 32063363 75435381 78025437 96190089 224443541 288570267 673330623 865710801 2019991869 2597132403 6059975607 18179926821
• Sum of all divisors σ(n): 31354697088
• Sum of proper divisors (its aliquot sum) s(n): 13174770267
• 18179926821 is a deficient number, because the sum of its proper divisors (13174770267) is less than itself. Its deficiency is 5005156554

Bases of 18179926821

• Binary: 10000111011100110111010101100100101₂
• Hexadecimal: 0x43B9BAB25
• Base-36: 8CNUXB9

Squares and roots of 18179926821

• 18179926821 squared (18179926821²) is 330509739216915166041
• 18179926821 cubed (18179926821³) is 6008642872591311563990444285661
• The square root of 18179926821 is 134832.9589566293
• The cube root of 18179926821 is 2629.4447121463

Scales and comparisons

• 18,179,926,821 seconds is equal to 578 years, 3 weeks, 2 days, 19 hours, 40 minutes, 21 seconds.
• To count from 1 to 18,179,926,821 would take you about one thousand, one hundred fifty-six 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 18179926821 cubic inches would be around 219.1 feet tall.

Recreational maths with 18179926821

• 18179926821 backwards is 12862997181
• The number of decimal digits it has is: 11
• The sum of 18179926821's digits is 54
• More coming soon!