21000731920
21,000,731,920 is an even composite number composed of seven prime numbers multiplied together.
21000731920 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of three hundred twenty divisors.
Prime factorization of 21000731920:
24 × 5 × 7 × 19 × 67 × 89 × 331
(2 × 2 × 2 × 2 × 5 × 7 × 19 × 67 × 89 × 331)See below for interesting mathematical facts about the number 21000731920 from the Numbermatics database.
Names of 21000731920
- Cardinal: 21000731920 can be written as Twenty-one billion, seven hundred thirty-one thousand, nine hundred twenty.
Scientific notation
- Scientific notation: 2.100073192 × 1010
Factors of 21000731920
Divisors of 21000731920
- Number of divisors d(n): 320
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Complete list of divisors:
1 2 4 5 7 8 10 14 16 19 20 28 35 38 40 56 67 70 76 80 89 95 112 133 134 140 152 178 190 266 268 280 304 331 335 356 380 445 469 532 536 560 623 662 665 670 712 760 890 938 1064 1072 1246 1273 1324 1330 1340 1424 1520 1655 1691 1780 1876 2128 2317 2345 2492 2546 2648 2660 2680 3115 3310 3382 3560 3752 4634 4690 4984 5092 5296 5320 5360 5963 6230 6289 6365 6620 6764 7120 7504 8455 8911 9268 9380 9968 10184 10640 11585 11837 11926 12460 12578 12730 13240 13528 16910 17822 18536 18760 20368 22177 23170 23674 23852 24920 25156 25460 26480 27056 29459 29815 31445 33820 35644 37072 37520 41741 44023 44354 44555 46340 47348 47704 49840 50312 50920 58918 59185 59630 62890 67640 71288 83482 88046 88708 89110 92680 94696 95408 100624 101840 110885 113297 117836 118370 119260 125780 135280 142576 147295 155239 166964 176092 177416 178220 185360 189392 206213 208705 220115 221770 226594 235672 236740 238520 251560 294590 310478 333928 352184 354832 356440 412426 417410 421363 440230 443540 453188 471344 473480 477040 503120 559721 566485 589180 620956 667856 704368 712880 776195 793079 824852 834820 842726 880460 887080 906376 946960 1031065 1119442 1132970 1178360 1241912 1552390 1586158 1649704 1669640 1685452 1760920 1774160 1812752 1973753 2062130 2106815 2238884 2265940 2356720 2483824 2798605 2949541 3104780 3172316 3299408 3339280 3370904 3521840 3918047 3947506 3965395 4124260 4213630 4477768 4531880 5597210 5899082 6209560 6344632 6741808 7836094 7895012 7930790 8248520 8427260 8955536 9063760 9868765 11194420 11798164 12419120 12689264 13816271 14747705 15672188 15790024 15861580 16497040 16854520 19590235 19737530 22388840 23596328 27632542 29495410 31344376 31580048 31723160 33709040 37501307 39180470 39475060 44777680 47192656 55265084 58990820 62688752 63446320 69081355 75002614 78360940 78950120 110530168 117981640 138162710 150005228 156721880 157900240 187506535 221060336 235963280 262509149 276325420 300010456 313443760 375013070 525018298 552650840 600020912 750026140 1050036596 1105301680 1312545745 1500052280 2100073192 2625091490 3000104560 4200146384 5250182980 10500365960 21000731920
- Sum of all divisors σ(n): 60467558400
- Sum of proper divisors (its aliquot sum) s(n): 39466826480
- 21000731920 is an abundant number, because the sum of its proper divisors (39466826480) is greater than itself. Its abundance is 18466094560
Bases of 21000731920
- Binary: 100111000111011110110111101000100002
- Hexadecimal: 0x4E3BDBD10
- Base-36: 9NBAKGG
Squares and roots of 21000731920
- 21000731920 squared (210007319202) is 441030741175706886400
- 21000731920 cubed (210007319203) is 9261968363909925937784293888000
-
The
square root of 21000731920 is 144916.2928038115 -
The
cube root of 21000731920 is 2758.9562285767
Scales and comparisons
How big is 21000731920?- 21,000,731,920 seconds is equal to 667 years, 39 weeks, 3 days, 38 minutes, 40 seconds.
-
To count from 1 to 21,000,731,920 would take you about one thousand, three hundred thirty-five 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 21000731920 cubic inches would be around 229.9 feet tall.
Recreational maths with 21000731920
- 21000731920 backwards is 02913700012
- The number of decimal digits it has is: 11
- The sum of 21000731920's digits is 25
- More coming soon!
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