18189393880

Names of 18189393880

• Cardinal: 18189393880 can be written as Eighteen billion, one hundred eighty-nine million, three hundred ninety-three thousand, eight hundred eighty.

Scientific notation

• Scientific notation: 1.818939388 × 10¹⁰

Factors of 18189393880

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 420

Divisors of 18189393880

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 4 5 7 8 10 14 19 20 28 35 37 38 40 43 49 56 70 74 76 86 95 98 133 140 148 152 172 185 190 196 215 245 259 266 280 296 301 307 344 370 380 392 430 490 518 532 602 614 665 703 740 760 817 860 931 980 1036 1064 1204 1228 1295 1330 1406 1480 1505 1535 1591 1634 1720 1813 1862 1960 2072 2107 2149 2408 2456 2590 2660 2812 3010 3070 3182 3268 3515 3626 3724 4085 4214 4298 4655 4921 5180 5320 5624 5719 5833 6020 6140 6364 6536 7030 7252 7448 7955 8170 8428 8596 9065 9310 9842 10360 10535 10745 11137 11359 11438 11666 12040 12280 12728 13201 14060 14504 15043 15910 16340 16856 17192 18130 18620 19684 21070 21490 22274 22718 22876 23332 24605 26402 28120 28595 29165 30086 30229 31820 32680 34447 36260 37240 39368 40033 40831 42140 42980 44548 45436 45752 46664 49210 52804 55685 56795 57190 58330 60172 60458 63640 66005 68894 72520 75215 77959 79513 80066 81662 84280 85960 89096 90872 92407 98420 105608 111370 113590 114380 116660 120344 120916 132010 137788 150430 151145 155918 159026 160132 163324 172235 184814 196840 200165 204155 211603 215821 222740 227180 228760 233320 241832 250819 264020 275576 285817 300860 302290 311836 318052 320264 326648 344470 369628 389795 397565 400330 408310 423206 431642 445480 454360 462035 488437 501638 528040 556591 571634 601720 604580 623672 636104 646849 688940 739256 779590 795130 800660 816620 846412 863284 924070 976874 1003276 1058015 1079105 1113182 1143268 1209160 1254095 1293698 1377880 1429085 1481221 1510747 1559180 1590260 1601320 1633240 1692824 1726568 1755733 1848140 1953748 2006552 2116030 2158210 2226364 2286536 2442185 2508190 2587396 2782955 2858170 2962442 3021494 3118360 3180520 3234245 3419059 3511466 3696280 3907496 4232060 4316420 4452728 4884370 5016380 5174792 5565910 5716340 5924884 6042988 6468490 6838118 7022932 7406105 7553735 8464120 8632840 8778665 9280303 9768740 10032760 10575229 11131820 11432680 11849768 12085976 12290131 12936980 13676236 14045864 14812210 15107470 17095295 17557330 18560606 19537480 21150458 22263640 23933413 24580262 25873960 27352472 29624420 30214940 34190590 35114660 37121212 42300916 46401515 47866826 49160524 52876145 59248840 60429880 61450655 64962121 68381180 70229320 74242424 84601832 92803030 95733652 98321048 105752290 119667065 122901310 129924242 136762360 185606060 191467304 211504580 239334130 245802620 259848484 324810605 371212120 423009160 454734847 478668260 491605240 519696968 649621210 909469694 957336520 1299242420 1818939388 2273674235 2598484840 3637878776 4547348470 9094696940 18189393880
• Sum of all divisors σ(n): 52836537600
• Sum of proper divisors (its aliquot sum) s(n): 34647143720
• 18189393880 is an abundant number, because the sum of its proper divisors (34647143720) is greater than itself. Its abundance is 16457749840

Bases of 18189393880

• Binary: 10000111100001011000001111111011000₂
• Hexadecimal: 0x43C2C1FD8
• Base-36: 8CTHU54

Squares and roots of 18189393880

• 18189393880 squared (18189393880²) is 330854049721781454400
• 18189393880 cubed (18189393880³) is 6018034627182587289360859072000
• The square root of 18189393880 is 134868.0610077863
• The cube root of 18189393880 is 2629.9010540731

Scales and comparisons

• 18,189,393,880 seconds is equal to 578 years, 19 weeks, 9 hours, 24 minutes, 40 seconds.
• To count from 1 to 18,189,393,880 would take you about one thousand, one hundred fifty-six 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 18189393880 cubic inches would be around 219.2 feet tall.

Recreational maths with 18189393880

• 18189393880 backwards is 08839398181
• The number of decimal digits it has is: 11
• The sum of 18189393880's digits is 58
• More coming soon!