18381989307

Names of 18381989307

• Cardinal: 18381989307 can be written as Eighteen billion, three hundred eighty-one million, nine hundred eighty-nine thousand, three hundred seven.

Scientific notation

• Scientific notation: 1.8381989307 × 10¹⁰

Factors of 18381989307

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 545

Divisors of 18381989307

• Number of divisors d(n): 72
• Complete list of divisors:
  1 3 11 31 33 61 93 121 183 341 363 439 671 1023 1317 1891 2013 3721 3751 4829 5673 7381 11163 11253 13609 14487 20801 22143 26779 40827 40931 53119 62403 80337 115351 122793 149699 159357 228811 294569 346053 449097 450241 686433 830149 883707 1268861 1350723 1633519 1646689 2490447 3240259 3806583 4900557 4940067 9131639 9720777 13957471 17968709 27394917 41872413 50639089 53906127 100448029 151917267 197655799 301344087 557029979 592967397 1671089937 6127329769 18381989307
• Sum of all divisors σ(n): 28336788480
• Sum of proper divisors (its aliquot sum) s(n): 9954799173
• 18381989307 is a deficient number, because the sum of its proper divisors (9954799173) is less than itself. Its deficiency is 8427190134

Bases of 18381989307

• Binary: 10001000111101001101110010110111011₂
• Hexadecimal: 0x447A6E5BB
• Base-36: 8G05TQ3

Squares and roots of 18381989307

• 18381989307 squared (18381989307²) is 337897530882662340249
• 18381989307 cubed (18381989307³) is 6211228799546801410148713717443
• The square root of 18381989307 is 135580.1951134457
• The cube root of 18381989307 is 2639.1505774213

Scales and comparisons

• 18,381,989,307 seconds is equal to 584 years, 25 weeks, 3 days, 12 hours, 8 minutes, 27 seconds.
• To count from 1 to 18,381,989,307 would take you about one thousand, one hundred sixty-eight 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 18381989307 cubic inches would be around 219.9 feet tall.

Recreational maths with 18381989307

• 18381989307 backwards is 70398918381
• The number of decimal digits it has is: 11
• The sum of 18381989307's digits is 57
• More coming soon!