19999980

Names of 19999980

• Cardinal: 19999980 can be written as Nineteen million, nine hundred ninety-nine thousand, nine hundred eighty.

Scientific notation

• Scientific notation: 1.999998 × 10⁷

Factors of 19999980

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 78

Divisors of 19999980

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 4 5 6 7 9 10 11 12 13 14 15 18 20 21 22 26 27 28 30 33 35 36 37 39 42 44 45 52 54 55 60 63 65 66 70 74 77 78 84 90 91 99 105 108 110 111 117 126 130 132 135 140 143 148 154 156 165 180 182 185 189 195 198 210 220 222 231 234 252 259 260 270 273 286 297 308 315 330 333 351 364 370 378 385 390 396 407 420 429 444 455 462 468 481 495 518 540 546 555 572 585 594 630 660 666 693 702 715 740 756 770 777 780 814 819 858 910 924 945 962 990 999 1001 1036 1092 1110 1155 1170 1188 1221 1260 1287 1295 1332 1365 1386 1404 1430 1443 1485 1540 1554 1628 1638 1665 1716 1755 1820 1890 1924 1980 1998 2002 2035 2079 2145 2220 2310 2331 2340 2405 2442 2457 2574 2590 2730 2772 2849 2860 2886 2970 3003 3108 3276 3330 3367 3465 3510 3663 3780 3861 3885 3996 4004 4070 4095 4158 4290 4329 4620 4662 4810 4884 4914 4995 5005 5148 5180 5291 5460 5698 5772 5940 6006 6105 6435 6660 6734 6930 6993 7020 7215 7326 7722 7770 8140 8190 8316 8547 8580 8658 9009 9324 9620 9828 9990 10010 10101 10395 10582 10989 11396 11655 12012 12210 12285 12870 12987 13468 13860 13986 14245 14430 14652 15015 15444 15540 15873 16380 16835 17094 17316 18018 18315 19305 19980 20020 20202 20790 21164 21645 21978 23310 24420 24570 25641 25740 25974 26455 27027 27972 28490 28860 30030 30303 31746 33670 34188 34965 36036 36630 37037 38610 40404 41580 42735 43290 43956 45045 46620 47619 49140 50505 51282 51948 52910 54054 54945 56980 60060 60606 63492 64935 67340 69930 73260 74074 76923 77220 79365 85470 86580 90090 90909 95238 101010 102564 105820 108108 109890 111111 121212 128205 129870 135135 139860 142857 148148 151515 153846 158730 170940 180180 181818 185185 190476 202020 219780 222222 238095 256410 259740 270270 285714 303030 307692 317460 333333 363636 370370 384615 444444 454545 476190 512820 540540 555555 571428 606060 666666 714285 740740 769230 909090 952380 999999 1111110 1333332 1428570 1538460 1666665 1818180 1999998 2222220 2857140 3333330 3999996 4999995 6666660 9999990 19999980
• Sum of all divisors σ(n): 85800960
• Sum of proper divisors (its aliquot sum) s(n): 65800980
• 19999980 is an abundant number, because the sum of its proper divisors (65800980) is greater than itself. Its abundance is 45801000

Bases of 19999980

• Binary: 1001100010010110011101100₂
• Hexadecimal: 0x1312CEC
• Base-36: BWO30

Squares and roots of 19999980

• 19999980 squared (19999980²) is 399999200000400
• 19999980 cubed (19999980³) is 7999976000023999992000
• The square root of 19999980 is 4472.1337189311
• The cube root of 19999980 is 271.4416711789

Scales and comparisons

• 19,999,980 seconds is equal to 33 weeks, 11 hours, 33 minutes.
• To count from 1 to 19,999,980 would take you about forty-nine weeks!

  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 19999980 cubic inches would be around 22.6 feet tall.

Recreational maths with 19999980

• 19999980 backwards is 08999991
• 19999980 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 19999980's digits is 54
• More coming soon!