18538257920

Names of 18538257920

• Cardinal: 18538257920 can be written as Eighteen billion, five hundred thirty-eight million, two hundred fifty-seven thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 1.853825792 × 10¹⁰

Factors of 18538257920

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 226

Divisors of 18538257920

• Number of divisors d(n): 640
• Complete list of divisors:
  1 2 4 5 7 8 10 13 14 16 17 20 26 28 31 32 34 35 40 52 56 62 64 65 68 70 80 85 91 104 112 119 124 128 130 136 140 151 155 160 170 182 208 217 221 224 238 248 256 260 272 280 302 310 320 340 364 403 416 434 442 448 455 476 496 512 520 527 544 560 595 604 620 640 680 728 755 806 832 868 884 896 910 952 992 1040 1054 1057 1085 1088 1105 1120 1190 1208 1240 1280 1360 1456 1510 1547 1612 1664 1736 1768 1792 1820 1904 1963 1984 2015 2080 2108 2114 2170 2176 2210 2240 2380 2416 2480 2560 2567 2635 2720 2821 2912 3020 3094 3224 3328 3472 3536 3584 3640 3689 3808 3926 3968 4030 4160 4216 4228 4340 4352 4420 4480 4681 4760 4832 4960 5134 5270 5285 5440 5642 5824 6040 6188 6448 6656 6851 6944 7072 7280 7378 7616 7735 7852 7936 8060 8320 8432 8456 8680 8704 8840 8960 9362 9520 9664 9815 9920 10268 10540 10570 10880 11284 11648 12080 12376 12835 12896 13702 13741 13888 14105 14144 14560 14756 15232 15470 15704 15872 16120 16640 16864 16912 17360 17680 17920 17969 18445 18724 19040 19328 19630 19840 20536 21080 21140 21760 22568 23296 23405 24160 24752 25670 25792 27404 27482 27776 28210 28288 29120 29512 30464 30940 31408 32240 32767 33280 33371 33728 33824 34255 34720 35360 35938 36890 37448 38080 38656 39260 39680 41072 42160 42280 43520 45136 46592 46810 47957 48320 49504 51340 51584 54808 54964 55552 56420 56576 58240 59024 60853 60928 61880 62816 64480 65534 66742 67456 67648 68510 68705 69440 70720 71876 73780 74896 76160 77312 78520 79360 79577 82144 84320 84560 89845 90272 93620 95914 96640 99008 102680 103168 109616 109928 111104 112840 113152 116480 118048 121706 123760 125632 128960 131068 133484 134912 135296 137020 137410 138880 141440 143752 147560 149792 152320 157040 159154 163835 164288 166855 168640 169120 179690 180544 187240 191828 193280 198016 205360 206336 219232 219856 225680 232960 233597 236096 239785 243412 247520 251264 257920 262136 266968 269824 270592 274040 274820 277760 282880 287504 295120 299584 304265 304640 314080 318308 327670 328576 333710 337280 338240 359380 361088 374480 383656 386560 396032 397885 410720 425971 438464 439712 451360 467194 472192 479570 486824 495040 502528 515840 524272 533936 541184 548080 549640 555520 557039 565760 575008 590240 599168 608530 628160 636616 655340 657152 667420 674560 676480 718760 722176 748960 767312 792064 795770 821440 851942 876928 879424 902720 934388 944384 959140 973648 990080 1005056 1031680 1034501 1048544 1067872 1096160 1099280 1114078 1150016 1167985 1180480 1198336 1217060 1256320 1273232 1310680 1314304 1334840 1349120 1352960 1437520 1444352 1497920 1534624 1591540 1642880 1703884 1753856 1758848 1805440 1868776 1888768 1918280 1947296 1980160 2069002 2097088 2129855 2135744 2192320 2198560 2228156 2300032 2335970 2360960 2396672 2434120 2512640 2546464 2621360 2669680 2705920 2785195 2875040 2995840 3069248 3183080 3285760 3407768 3507712 3517696 3610880 3737552 3836560 3894592 3960320 4138004 4194176 4259710 4271488 4384640 4397120 4456312 4600064 4671940 4721920 4868240 5025280 5092928 5172505 5242720 5339360 5570390 5750080 5991680 6138496 6366160 6571520 6815536 7035392 7221760 7241507 7475104 7673120 7789184 8276008 8388352 8519420 8542976 8769280 8794240 8912624 9200128 9343880 9443840 9736480 10185856 10345010 10485440 10678720 11140780 11500160 11983360 12276992 12732320 13631072 14483014 14950208 15346240 15578368 16552016 16776704 17038840 17085952 17538560 17588480 17825248 18687760 19472960 20371712 20690020 20970880 21357440 22281560 23000320 24553984 25464640 27262144 28966028 29900416 30692480 31156736 33104032 34077680 35176960 35650496 36207535 37375520 38945920 40743424 41380040 41941760 42714880 44563120 46000640 50929280 54524288 57932056 59800832 61384960 66208064 68155360 71300992 72415070 74751040 77891840 82760080 83883520 85429760 89126240 101858560 109048576 115864112 119601664 122769920 132416128 136310720 142601984 144830140 149502080 155783680 165520160 178252480 203717120 218097152 231728224 264832256 272621440 285203968 289660280 299004160 331040320 356504960 463456448 529664512 545242880 579320560 598008320 662080640 713009920 926912896 1090485760 1158641120 1324161280 1426019840 1853825792 2317282240 2648322560 3707651584 4634564480 9269128960 18538257920
• Sum of all divisors σ(n): 60188147712
• Sum of proper divisors (its aliquot sum) s(n): 41649889792
• 18538257920 is an abundant number, because the sum of its proper divisors (41649889792) is greater than itself. Its abundance is 23111631872

Bases of 18538257920

• Binary: 10001010000111101110101111000000000₂
• Hexadecimal: 0x450F75E00
• Base-36: 8IL77CW

Squares and roots of 18538257920

• 18538257920 squared (18538257920²) is 343667006708442726400
• 18538257920 cubed (18538257920³) is 6370987608955481503551193088000
• The square root of 18538257920 is 136155.2713632491
• The cube root of 18538257920 is 2646.6081165435

Scales and comparisons

• 18,538,257,920 seconds is equal to 589 years, 23 weeks, 6 days, 4 hours, 5 minutes, 20 seconds.
• To count from 1 to 18,538,257,920 would take you about one thousand, one hundred seventy-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 18538257920 cubic inches would be around 220.6 feet tall.

Recreational maths with 18538257920

• 18538257920 backwards is 02975283581
• The number of decimal digits it has is: 11
• The sum of 18538257920's digits is 50
• More coming soon!