18720789984

Names of 18720789984

• Cardinal: 18720789984 can be written as Eighteen billion, seven hundred twenty million, seven hundred eighty-nine thousand, nine hundred eighty-four.

Scientific notation

• Scientific notation: 1.8720789984 × 10¹⁰

Factors of 18720789984

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 17
• Sum of prime factors: 37

Divisors of 18720789984

• Number of divisors d(n): 432
• Complete list of divisors:
  1 2 3 4 6 8 9 12 13 16 18 19 24 26 27 32 36 38 39 48 52 54 57 72 76 78 81 96 104 108 114 117 144 152 156 162 171 208 216 228 234 243 247 288 304 312 324 342 351 361 416 432 456 468 486 494 513 608 624 648 684 702 722 729 741 864 912 936 972 988 1026 1053 1083 1248 1296 1368 1404 1444 1458 1482 1539 1824 1872 1944 1976 2052 2106 2166 2187 2223 2592 2736 2808 2888 2916 2964 3078 3159 3249 3744 3888 3952 4104 4212 4332 4374 4446 4617 4693 5472 5616 5776 5832 5928 6156 6318 6498 6561 6669 6859 7776 7904 8208 8424 8664 8748 8892 9234 9386 9477 9747 11232 11552 11664 11856 12312 12636 12996 13122 13338 13718 13851 14079 16416 16848 17328 17496 17784 18468 18772 18954 19494 20007 20577 23328 23712 24624 25272 25992 26244 26676 27436 27702 28158 28431 29241 33696 34656 34992 35568 36936 37544 37908 38988 40014 41154 41553 42237 49248 50544 51984 52488 53352 54872 55404 56316 56862 58482 60021 61731 69984 71136 73872 75088 75816 77976 80028 82308 83106 84474 85293 87723 89167 101088 103968 104976 106704 109744 110808 112632 113724 116964 120042 123462 124659 126711 147744 150176 151632 155952 160056 164616 166212 168948 170586 175446 178334 180063 185193 209952 213408 219488 221616 225264 227448 233928 240084 246924 249318 253422 263169 267501 303264 311904 320112 329232 332424 337896 341172 350892 356668 360126 370386 380133 443232 450528 454896 467856 480168 493848 498636 506844 526338 535002 540189 555579 640224 658464 664848 675792 682344 701784 713336 720252 740772 760266 789507 802503 909792 935712 960336 987696 997272 1013688 1052676 1070004 1080378 1111158 1140399 1329696 1351584 1364688 1403568 1426672 1440504 1481544 1520532 1579014 1605006 1620567 1666737 1920672 1975392 1994544 2027376 2105352 2140008 2160756 2222316 2280798 2368521 2407509 2729376 2807136 2853344 2881008 2963088 3041064 3158028 3210012 3241134 3333474 3421197 3989088 4054752 4210704 4280016 4321512 4444632 4561596 4737042 4815018 5000211 5762016 5926176 6082128 6316056 6420024 6482268 6666948 6842394 7222527 8421408 8560032 8643024 8889264 9123192 9474084 9630036 10000422 10263591 12164256 12632112 12840048 12964536 13333896 13684788 14445054 15000633 17286048 17778528 18246384 18948168 19260072 20000844 20527182 21667581 25264224 25680096 25929072 26667792 27369576 28890108 30001266 30790773 36492768 37896336 38520144 40001688 41054364 43335162 45001899 51858144 53335584 54739152 57780216 60002532 61581546 65002743 75792672 77040288 80003376 82108728 86670324 90003798 109478304 115560432 120005064 123163092 130005486 160006752 164217456 173340648 180007596 195008229 231120864 240010128 246326184 260010972 328434912 346681296 360015192 390016458 480020256 492652368 520021944 585024687 693362592 720030384 780032916 985304736 1040043888 1170049374 1440060768 1560065832 2080087776 2340098748 3120131664 4680197496 6240263328 9360394992 18720789984
• Sum of all divisors σ(n): 62841476880
• Sum of proper divisors (its aliquot sum) s(n): 44120686896
• 18720789984 is an abundant number, because the sum of its proper divisors (44120686896) is greater than itself. Its abundance is 25399896912

Bases of 18720789984

• Binary: 10001011011110110001001010111100000₂
• Hexadecimal: 0x45BD895E0
• Base-36: 8LLVI00

Squares and roots of 18720789984

• 18720789984 squared (18720789984²) is 350467977625034720256
• 18720789984 cubed (18720789984³) is 6561037405235486098620766715904
• The square root of 18720789984 is 136823.9379056165
• The cube root of 18720789984 is 2655.2661382163

Scales and comparisons

• 18,720,789,984 seconds is equal to 595 years, 13 weeks, 4 days, 19 hours, 26 minutes, 24 seconds.
• To count from 1 to 18,720,789,984 would take you about one thousand, one hundred ninety 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 18720789984 cubic inches would be around 221.3 feet tall.

Recreational maths with 18720789984

• 18720789984 backwards is 48998702781
• The number of decimal digits it has is: 11
• The sum of 18720789984's digits is 63
• More coming soon!