18720268749

Names of 18720268749

• Cardinal: 18720268749 can be written as Eighteen billion, seven hundred twenty million, two hundred sixty-eight thousand, seven hundred forty-nine.

Scientific notation

• Scientific notation: 1.8720268749 × 10¹⁰

Factors of 18720268749

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 466

Divisors of 18720268749

• Number of divisors d(n): 168
• Complete list of divisors:
  1 3 7 9 13 21 27 39 49 63 81 91 117 147 169 189 243 273 343 351 441 443 507 567 637 729 819 1029 1053 1183 1323 1329 1521 1701 1911 2457 3087 3101 3159 3549 3969 3987 4459 4563 5103 5733 5759 7371 8281 9261 9303 9477 10647 11907 11961 13377 13689 17199 17277 21707 22113 24843 27783 27909 31941 35721 35883 40131 40313 41067 51597 51831 57967 65121 66339 74529 74867 83349 83727 95823 107649 120393 120939 123201 151949 154791 155493 173901 195363 223587 224601 250047 251181 282191 287469 322947 361179 362817 455847 464373 466479 521703 524069 586089 670761 673803 753543 846573 862407 1083537 1088451 1367541 1399437 1565109 1572207 1758267 1975337 2012283 2021409 2260629 2539719 3250611 3265353 3668483 4102623 4198311 4695327 4716621 5274801 5926011 6036849 6064227 7619157 9796059 11005449 12307869 14085981 14149863 15824403 17778033 18192681 22857471 25679381 29388177 33016347 36923607 42257943 42449589 53334099 54578043 68572413 77038143 99049041 110770821 127348767 160002297 205717239 231114429 297147123 382046301 480006891 693343287 891441369 1440020673 2080029861 2674324107 6240089583 18720268749
• Sum of all divisors σ(n): 35523374400
• Sum of proper divisors (its aliquot sum) s(n): 16803105651
• 18720268749 is a deficient number, because the sum of its proper divisors (16803105651) is less than itself. Its deficiency is 1917163098

Bases of 18720268749

• Binary: 10001011011110100001010000111001101₂
• Hexadecimal: 0x45BD0A1CD
• Base-36: 8LLKBT9

Squares and roots of 18720268749

• 18720268749 squared (18720268749²) is 350448462034786025001
• 18720268749 cubed (18720268749³) is 6560489391964917774728152993749
• The square root of 18720268749 is 136822.0331269785
• The cube root of 18720268749 is 2655.2414948389

Scales and comparisons

• 18,720,268,749 seconds is equal to 595 years, 12 weeks, 5 days, 18 hours, 39 minutes, 9 seconds.
• To count from 1 to 18,720,268,749 would take you about one thousand, one hundred ninety 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 18720268749 cubic inches would be around 221.3 feet tall.

Recreational maths with 18720268749

• 18720268749 backwards is 94786202781
• The number of decimal digits it has is: 11
• The sum of 18720268749's digits is 54
• More coming soon!