21117157920
21,117,157,920 is an even composite number composed of six prime numbers multiplied together.
21117157920 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of three hundred eighty-four divisors.
Prime factorization of 21117157920:
25 × 33 × 5 × 17 × 421 × 683
(2 × 2 × 2 × 2 × 2 × 3 × 3 × 3 × 5 × 17 × 421 × 683)See below for interesting mathematical facts about the number 21117157920 from the Numbermatics database.
Names of 21117157920
- Cardinal: 21117157920 can be written as Twenty-one billion, one hundred seventeen million, one hundred fifty-seven thousand, nine hundred twenty.
Scientific notation
- Scientific notation: 2.111715792 × 1010
Factors of 21117157920
Divisors of 21117157920
- Number of divisors d(n): 384
-
Complete list of divisors:
1 2 3 4 5 6 8 9 10 12 15 16 17 18 20 24 27 30 32 34 36 40 45 48 51 54 60 68 72 80 85 90 96 102 108 120 135 136 144 153 160 170 180 204 216 240 255 270 272 288 306 340 360 408 421 432 459 480 510 540 544 612 680 683 720 765 816 842 864 918 1020 1080 1224 1263 1360 1366 1440 1530 1632 1684 1836 2040 2049 2105 2160 2295 2448 2526 2720 2732 3060 3368 3415 3672 3789 4080 4098 4210 4320 4590 4896 5052 5464 6120 6147 6315 6736 6830 7157 7344 7578 8160 8196 8420 9180 10104 10245 10928 11367 11611 12240 12294 12630 13472 13660 14314 14688 15156 16392 16840 18360 18441 18945 20208 20490 21471 21856 22734 23222 24480 24588 25260 27320 28628 30312 30735 32784 33680 34833 35785 36720 36882 37890 40416 40980 42942 45468 46444 49176 50520 54640 56835 57256 58055 60624 61470 64413 65568 67360 69666 71570 73440 73764 75780 81960 85884 90936 92205 92888 98352 101040 104499 107355 109280 113670 114512 116110 121248 122940 128826 139332 143140 147528 151560 163920 171768 174165 181872 184410 185776 193239 196704 202080 208998 214710 227340 229024 232220 245880 257652 278664 286280 287543 295056 303120 313497 322065 327840 343536 348330 363744 368820 371552 386478 417996 429420 454680 464440 491760 515304 522495 557328 572560 575086 590112 606240 626994 644130 687072 696660 737640 772956 835992 858840 862629 909360 928880 966195 983520 1030608 1044990 1114656 1145120 1150172 1253988 1288260 1393320 1437715 1475280 1545912 1567485 1671984 1717680 1725258 1818720 1857760 1932390 2061216 2089980 2300344 2507976 2576520 2587887 2786640 2875430 2950560 3091824 3134970 3343968 3435360 3450516 3864780 4179960 4313145 4600688 4888231 5015952 5153040 5175774 5573280 5750860 6183648 6269940 6901032 7729560 7763661 8359920 8626290 9201376 9776462 10031904 10306080 10351548 11501720 12539880 12939435 13802064 14664693 15459120 15527322 16719840 17252580 19552924 20703096 23003440 24441155 25079760 25878870 27604128 29329386 30918240 31054644 34505160 38818305 39105848 41406192 43994079 46006880 48882310 50159520 51757740 58658772 62109288 69010320 73323465 77636610 78211696 82812384 87988158 97764620 103515480 117317544 124218576 131982237 138020640 146646930 155273220 156423392 175976316 195529240 207030960 219970395 234635088 248437152 263964474 293293860 310546440 351952632 391058480 414061920 439940790 469270176 527928948 586587720 621092880 659911185 703905264 782116960 879881580 1055857896 1173175440 1242185760 1319822370 1407810528 1759763160 2111715792 2346350880 2639644740 3519526320 4223431584 5279289480 7039052640 10558578960 21117157920
- Sum of all divisors σ(n): 78558439680
- Sum of proper divisors (its aliquot sum) s(n): 57441281760
- 21117157920 is an abundant number, because the sum of its proper divisors (57441281760) is greater than itself. Its abundance is 36324123840
Bases of 21117157920
- Binary: 100111010101010111001000010001000002
- Hexadecimal: 0x4EAAE4220
- Base-36: 9P8LZC0
Squares and roots of 21117157920
- 21117157920 squared (211171579202) is 445934358618218726400
- 21117157920 cubed (211171579203) is 9416866272894837834490073088000
-
The
square root of 21117157920 is 145317.4384580185 -
The
cube root of 21117157920 is 2764.0452966969
Scales and comparisons
How big is 21117157920?- 21,117,157,920 seconds is equal to 671 years, 23 weeks, 6 days, 13 hours, 12 minutes.
-
To count from 1 to 21,117,157,920 would take you about one thousand, three hundred forty-two 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 21117157920 cubic inches would be around 230.3 feet tall.
Recreational maths with 21117157920
- 21117157920 backwards is 02975171112
- 21117157920 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 21117157920's digits is 36
- More coming soon!
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