18738638820

Names of 18738638820

• Cardinal: 18738638820 can be written as Eighteen billion, seven hundred thirty-eight million, six hundred thirty-eight thousand, eight hundred twenty.

Scientific notation

• Scientific notation: 1.873863882 × 10¹⁰

Factors of 18738638820

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 3821

Divisors of 18738638820

• Number of divisors d(n): 336
• Complete list of divisors:
  1 2 3 4 5 6 9 10 11 12 15 18 20 22 27 30 31 33 36 44 45 54 55 60 62 66 81 90 93 99 108 110 124 132 135 155 162 165 180 186 198 220 243 270 279 297 310 324 330 341 372 396 405 465 486 495 540 558 594 620 660 682 729 810 837 891 930 972 990 1023 1116 1188 1215 1364 1395 1458 1485 1620 1674 1705 1782 1860 1980 2046 2430 2511 2673 2790 2916 2970 3069 3348 3410 3564 3645 3769 4092 4185 4455 4860 5022 5115 5346 5580 5940 6138 6820 7290 7533 7538 8019 8370 8910 9207 10044 10230 10692 11307 12276 12555 13365 14580 15066 15076 15345 16038 16740 17820 18414 18845 20460 22599 22614 25110 26730 27621 30132 30690 32076 33921 36828 37665 37690 40095 41459 45198 45228 46035 50220 53460 55242 56535 61380 67842 75330 75380 80190 82863 82918 90396 92070 101763 110484 112995 113070 116839 124377 135684 138105 150660 160380 165726 165836 169605 184140 203526 207295 225990 226140 233678 248589 248754 276210 305289 331452 339210 350517 373131 407052 414315 414590 451980 467356 497178 497508 508815 552420 584195 610578 621885 678420 701034 746262 828630 829180 915867 994356 1017630 1051551 1119393 1168390 1221156 1242945 1243770 1285229 1402068 1492524 1526445 1657260 1752585 1831734 1865655 2035260 2103102 2238786 2336780 2485890 2487540 2570458 2747601 3052890 3154653 3358179 3505170 3663468 3731310 3855687 4206204 4477572 4579335 4971780 5140916 5257755 5495202 5596965 6105780 6309306 6426145 6716358 7010340 7462620 7711374 9158670 9463959 10074537 10515510 10990404 11193930 11567061 12618612 12852290 13432716 13738005 15422748 15773265 16790895 18317340 18927918 19278435 20149074 21031020 22387860 23134122 25704580 27476010 28391877 30223611 31546530 33581790 34701183 37855836 38556870 40298148 46268244 47319795 50372685 54952020 56783754 57835305 60447222 63093060 67163580 69402366 77113740 85175631 94639590 100745370 104103549 113567508 115670610 120894444 138804732 141959385 151118055 170351262 173505915 189279180 201490740 208207098 231341220 283918770 302236110 312310647 340702524 347011830 416414196 425878155 520517745 567837540 604472220 624621294 694023660 851756310 936931941 1041035490 1249242588 1561553235 1703512620 1873863882 2082070980 3123106470 3747727764 4684659705 6246212940 9369319410 18738638820
• Sum of all divisors σ(n): 66457198080
• Sum of proper divisors (its aliquot sum) s(n): 47718559260
• 18738638820 is an abundant number, because the sum of its proper divisors (47718559260) is greater than itself. Its abundance is 28979920440

Bases of 18738638820

• Binary: 10001011100111010001110111111100100₂
• Hexadecimal: 0x45CE8EFE4
• Base-36: 8LWI290

Squares and roots of 18738638820

• 18738638820 squared (18738638820²) is 351136584826410992400
• 18738638820 cubed (18738638820³) is 6579821639550407983461364968000
• The square root of 18738638820 is 136889.1479263423
• The cube root of 18738638820 is 2656.1097343087

Scales and comparisons

• 18,738,638,820 seconds is equal to 595 years, 43 weeks, 1 day, 9 hours, 27 minutes.
• To count from 1 to 18,738,638,820 would take you about one thousand, one hundred ninety-one 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 18738638820 cubic inches would be around 221.3 feet tall.

Recreational maths with 18738638820

• 18738638820 backwards is 02883683781
• 18738638820 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 18738638820's digits is 54
• More coming soon!