20721228165
20,721,228,165 is an odd composite number composed of seven prime numbers multiplied together.
20721228165 is an odd composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of two hundred fifty-six divisors.
Prime factorization of 20721228165:
33 × 5 × 11 × 31 × 47 × 61 × 157
(3 × 3 × 3 × 5 × 11 × 31 × 47 × 61 × 157)See below for interesting mathematical facts about the number 20721228165 from the Numbermatics database.
Names of 20721228165
- Cardinal: 20721228165 can be written as Twenty billion, seven hundred twenty-one million, two hundred twenty-eight thousand, one hundred sixty-five.
Scientific notation
- Scientific notation: 2.0721228165 × 1010
Factors of 20721228165
Divisors of 20721228165
- Number of divisors d(n): 256
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Complete list of divisors:
1 3 5 9 11 15 27 31 33 45 47 55 61 93 99 135 141 155 157 165 183 235 279 297 305 341 423 465 471 495 517 549 671 705 785 837 915 1023 1269 1395 1413 1457 1485 1551 1647 1705 1727 1891 2013 2115 2355 2585 2745 2867 3069 3355 4185 4239 4371 4653 4867 5115 5181 5673 6039 6345 7065 7285 7379 7755 8235 8601 8635 9207 9455 9577 10065 13113 13959 14335 14601 15345 15543 16027 17019 18117 20801 21195 21855 22137 23265 24335 25803 25905 28365 28731 30195 31537 36895 39339 43005 43803 46035 46629 47885 48081 51057 53537 62403 65565 66411 69795 73005 77409 77715 80135 81169 85095 86193 88877 90585 94611 104005 105347 110685 129015 131409 143655 144243 157685 160611 187209 196695 199233 219015 228749 233145 240405 243507 255285 258579 266631 267685 283833 296887 312015 316041 332055 387045 405845 430965 432729 444385 450119 473055 481833 526735 561627 657045 686247 721215 730521 799893 803055 851499 890661 936045 948123 977647 996165 1143745 1217535 1292895 1333155 1350357 1419165 1445499 1484435 1580205 2058741 2163645 2191563 2250595 2399679 2409165 2516239 2671983 2808135 2844369 2932941 3265757 3431235 3652605 3999465 4051071 4257495 4453305 4740615 4888235 4951309 6176223 6751785 7227495 7548717 8015949 8798823 9797271 10293705 10957815 11998395 12153213 12581195 13359915 13953689 14221845 14664705 14853927 16328785 20255355 22646151 24756545 26396469 29391813 30881115 37743585 40079745 41861067 43994115 44561781 48986355 60766065 67938453 69768445 74269635 88175439 113230755 125583201 131982345 133685343 146959065 153490579 209305335 222808905 339692265 376749603 440877195 460471737 627916005 668426715 767452895 1381415211 1883748015 2302358685 4144245633 6907076055 20721228165
- Sum of all divisors σ(n): 43334369280
- Sum of proper divisors (its aliquot sum) s(n): 22613141115
- 20721228165 is an abundant number, because the sum of its proper divisors (22613141115) is greater than itself. Its abundance is 1891912950
Bases of 20721228165
- Binary: 100110100110001010011011001100001012
- Hexadecimal: 0x4D314D985
- Base-36: 9IOVTZ9
Squares and roots of 20721228165
- 20721228165 squared (207212281652) is 429369296665989267225
- 20721228165 cubed (207212281653) is 8897059163261537401610381392125
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The
square root of 20721228165 is 143948.6997683549 -
The
cube root of 20721228165 is 2746.6616533155
Scales and comparisons
How big is 20721228165?- 20,721,228,165 seconds is equal to 658 years, 45 weeks, 2 days, 42 minutes, 45 seconds.
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To count from 1 to 20,721,228,165 would take you about one thousand, three hundred seventeen 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 20721228165 cubic inches would be around 228.9 feet tall.
Recreational maths with 20721228165
- 20721228165 backwards is 56182212702
- The number of decimal digits it has is: 11
- The sum of 20721228165's digits is 36
- More coming soon!
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