18231398640

Names of 18231398640

• Cardinal: 18231398640 can be written as Eighteen billion, two hundred thirty-one million, three hundred ninety-eight thousand, six hundred forty.

Scientific notation

• Scientific notation: 1.823139864 × 10¹⁰

Factors of 18231398640

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 470

Divisors of 18231398640

• Number of divisors d(n): 720
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 13 14 15 16 18 20 21 24 26 28 30 35 36 39 40 42 45 48 49 52 56 60 63 65 70 72 78 80 84 90 91 98 104 105 112 117 120 126 127 130 140 144 147 156 168 180 182 195 196 208 210 234 240 245 252 254 260 273 280 294 312 313 315 336 360 364 381 390 392 420 441 455 468 490 504 508 520 546 560 585 588 624 626 630 635 637 720 728 735 762 780 784 819 840 882 889 910 936 939 980 1008 1016 1040 1092 1143 1170 1176 1252 1260 1270 1274 1365 1456 1470 1524 1560 1565 1638 1651 1680 1764 1778 1820 1872 1878 1905 1911 1960 2032 2184 2191 2205 2286 2340 2352 2504 2520 2540 2548 2667 2730 2817 2940 3048 3120 3130 3185 3276 3302 3528 3556 3640 3756 3810 3822 3920 4069 4095 4368 4382 4410 4445 4572 4680 4695 4953 5008 5040 5080 5096 5334 5460 5634 5715 5733 5880 6096 6223 6260 6370 6552 6573 6604 7056 7112 7280 7512 7620 7644 8001 8138 8190 8255 8764 8820 8890 9144 9360 9390 9555 9906 10160 10192 10668 10920 10955 11268 11430 11466 11557 11760 12207 12446 12520 12740 13104 13146 13208 13335 14085 14224 14859 15024 15240 15288 15337 16002 16276 16380 16510 17528 17640 17780 18288 18669 18780 19110 19719 19812 20345 21336 21840 21910 22536 22860 22932 23114 24414 24765 24892 25040 25480 26292 26416 26670 28170 28483 28665 29718 30480 30576 30674 31115 32004 32552 32760 32865 33020 34671 35056 35280 35560 36621 37338 37560 38220 39438 39624 39751 40005 40690 42672 43820 45072 45720 45864 46011 46228 48828 49530 49784 50960 52584 53340 56007 56340 56966 57330 57785 59436 61035 61348 62230 64008 65104 65520 65730 66040 69342 71120 73242 74295 74676 75120 76440 76685 78876 79248 79502 80010 80899 81380 85449 87640 91440 91728 92022 92456 93345 97656 98595 99060 99568 104013 105168 106680 112014 112680 113932 114660 115570 118872 119253 122070 122696 124460 128016 131460 132080 138033 138684 142415 146484 148590 149352 152880 153370 157752 159004 160020 161798 162760 170898 173355 175280 183105 184044 184912 186690 195312 197190 198120 198755 199381 208026 213360 224028 225360 227864 229320 230055 231140 237744 238506 242697 244140 245392 248920 256347 262920 276066 277368 278257 280035 284830 292968 297180 298704 306740 315504 318008 320040 323596 325520 341796 346710 357759 366210 368088 373380 394380 396240 397510 398762 404495 416052 427245 448056 455728 458640 460110 462280 477012 485394 488280 497840 512694 516763 520065 525840 552132 554736 556514 560070 569660 585936 594360 596265 598143 613480 636016 640080 647192 683592 690165 693420 715518 728091 732420 736176 746760 788760 795020 797524 808990 832104 834771 854490 896112 920220 924560 954024 970788 976560 996905 1025388 1033526 1040130 1104264 1113028 1120140 1139320 1188720 1192530 1196286 1213485 1226960 1281735 1294384 1367184 1380330 1386840 1391285 1431036 1456182 1464840 1493520 1550289 1577520 1590040 1595048 1617980 1664208 1669542 1708980 1788795 1794429 1840440 1908048 1941576 1947799 1993810 2050776 2067052 2080260 2208528 2226056 2240280 2278640 2385060 2392572 2426970 2504313 2563470 2583815 2760660 2773680 2782570 2862072 2912364 2929680 2990715 3100578 3180080 3190096 3235960 3339084 3417960 3577590 3588858 3617341 3640455 3680880 3883152 3895598 3987620 4101552 4134104 4160520 4173855 4452112 4480560 4650867 4770120 4785144 4853940 5008626 5126940 5167630 5521320 5565140 5724144 5824728 5843397 5981430 6201156 6471920 6678168 6835920 7155180 7177716 7234682 7280910 7751445 7791196 7975240 8268208 8321040 8347710 8972145 9301734 9540240 9570288 9707880 9738995 10017252 10253880 10335260 10852023 11042640 11130280 11649456 11686794 11962860 12402312 12521565 13356336 14310360 14355432 14469364 14561820 15502890 15582392 15950480 16695420 17530191 17944290 18086705 18603468 19415760 19477990 20034504 20507760 20670520 21704046 22260560 23254335 23373588 23925720 24804624 25043130 25321387 28620720 28710864 28938728 29123640 29216985 31005780 31164784 32556069 33390840 35060382 35888580 36173410 37206936 38955980 40069008 41341040 43408092 46508670 46747176 47851440 50086260 50642774 54260115 57877456 58247280 58433970 62011560 65112138 66781680 70120764 71777160 72346820 74413872 75964161 77911960 86816184 87650955 93017340 93494352 100172520 101285548 108520230 116867940 124023120 126606935 130224276 140241528 143554320 144693640 151928322 155823920 162780345 173632368 175301910 186034680 200345040 202571096 217040460 227892483 233735880 253213870 260448552 280483056 289387280 303856644 325560690 350603820 372069360 379820805 405142192 434080920 455784966 467471760 506427740 520897104 607713288 651121380 701207640 759641610 868161840 911569932 1012855480 1139462415 1215426576 1302242760 1402415280 1519283220 1823139864 2025710960 2278924830 2604485520 3038566440 3646279728 4557849660 6077132880 9115699320 18231398640
• Sum of all divisors σ(n): 77553036288
• Sum of proper divisors (its aliquot sum) s(n): 59321637648
• 18231398640 is an abundant number, because the sum of its proper divisors (59321637648) is greater than itself. Its abundance is 41090239008

Bases of 18231398640

• Binary: 10000111110101011010001000011110000₂
• Hexadecimal: 0x43EAD10F0
• Base-36: 8DII580

Squares and roots of 18231398640

• 18231398640 squared (18231398640²) is 332383896370593849600
• 18231398640 cubed (18231398640³) is 6059823316248745645589804544000
• The square root of 18231398640 is 135023.6965869325
• The cube root of 18231398640 is 2631.9239075635

Scales and comparisons

• 18,231,398,640 seconds is equal to 579 years, 36 weeks, 3 days, 13 hours, 24 minutes.
• To count from 1 to 18,231,398,640 would take you about one thousand, one hundred fifty-nine 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 18231398640 cubic inches would be around 219.3 feet tall.

Recreational maths with 18231398640

• 18231398640 backwards is 04689313281
• 18231398640 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 18231398640's digits is 45
• More coming soon!