18157969920

Names of 18157969920

• Cardinal: 18157969920 can be written as Eighteen billion, one hundred fifty-seven million, nine hundred sixty-nine thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 1.815796992 × 10¹⁰

Factors of 18157969920

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 318

Divisors of 18157969920

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 48 60 64 80 96 109 120 128 160 192 199 218 240 256 320 327 384 398 436 480 512 545 597 640 654 768 796 872 960 995 1090 1194 1280 1308 1536 1592 1635 1744 1920 1990 2180 2388 2560 2616 2985 3184 3270 3488 3840 3980 4360 4776 5232 5970 6368 6540 6976 7680 7960 8720 9552 10464 11881 11940 12736 13080 13952 15920 17440 19104 20928 21691 23762 23880 25472 26160 27904 31840 34880 35643 38208 41856 43382 47524 47760 50944 52320 55808 59405 63680 65073 69760 71286 76416 83712 86764 95048 95520 101888 104640 108455 118810 127360 130146 139520 142572 152832 167424 173528 178215 190096 191040 209280 216910 237620 254720 260292 279040 285144 305664 325365 347056 356430 380192 382080 418560 433820 475240 509440 520584 570288 650730 694112 712860 760384 764160 837120 867640 950480 1041168 1140576 1301460 1388224 1425720 1520768 1528320 1735280 1900960 2082336 2281152 2364319 2602920 2776448 2851440 3041536 3470560 3801920 4164672 4562304 4728638 5205840 5552896 5702880 6083072 6941120 7092957 7603840 8329344 9124608 9457276 10411680 11105792 11405760 11821595 13882240 14185914 15207680 16658688 18249216 18914552 20823360 22811520 23643190 27764480 28371828 30415360 33317376 35464785 37829104 41646720 45623040 47286380 55528960 56743656 70929570 75658208 83293440 91246080 94572760 113487312 141859140 151316416 166586880 189145520 226974624 283718280 302632832 378291040 453949248 567436560 605265664 756582080 907898496 1134873120 1210531328 1513164160 1815796992 2269746240 3026328320 3631593984 4539492480 6052656640 9078984960 18157969920
• Sum of all divisors σ(n): 58880606400
• Sum of proper divisors (its aliquot sum) s(n): 40722636480
• 18157969920 is an abundant number, because the sum of its proper divisors (40722636480) is greater than itself. Its abundance is 22564666560

Bases of 18157969920

• Binary: 10000111010010011001010001000000000₂
• Hexadecimal: 0x43A4CA200
• Base-36: 8CASB9C

Squares and roots of 18157969920

• 18157969920 squared (18157969920²) is 329711871615624806400
• 18157969920 cubed (18157969920³) is 5986898247063417036617023488000
• The square root of 18157969920 is 134751.5117540431
• The cube root of 18157969920 is 2628.3857105261

Scales and comparisons

• 18,157,969,920 seconds is equal to 577 years, 19 weeks, 16 hours, 32 minutes.
• To count from 1 to 18,157,969,920 would take you about one thousand, one hundred fifty-four 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 18157969920 cubic inches would be around 219 feet tall.

Recreational maths with 18157969920

• 18157969920 backwards is 02996975181
• The number of decimal digits it has is: 11
• The sum of 18157969920's digits is 57
• More coming soon!