21090657280

Names of 21090657280

• Cardinal: 21090657280 can be written as Twenty-one billion, ninety million, six hundred fifty-seven thousand, two hundred eighty.

Scientific notation

• Scientific notation: 2.109065728 × 10¹⁰

Factors of 21090657280

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 963

Divisors of 21090657280

• Number of divisors d(n): 352
• Complete list of divisors:
  1 2 4 5 7 8 10 11 14 16 20 22 28 32 35 40 44 55 56 61 64 70 77 80 88 110 112 122 128 140 154 160 176 220 224 244 256 280 305 308 320 352 385 427 440 448 488 512 560 610 616 640 671 704 770 854 877 880 896 976 1024 1120 1220 1232 1280 1342 1408 1540 1708 1754 1760 1792 1952 2135 2240 2440 2464 2560 2684 2816 3080 3355 3416 3508 3520 3584 3904 4270 4385 4480 4697 4880 4928 5120 5368 5632 6139 6160 6710 6832 7016 7040 7168 7808 8540 8770 8960 9394 9647 9760 9856 10736 11264 12278 12320 13420 13664 14032 14080 15616 17080 17540 17920 18788 19294 19520 19712 21472 23485 24556 24640 26840 27328 28064 28160 30695 31232 34160 35080 35840 37576 38588 39040 39424 42944 46970 48235 49112 49280 53497 53680 54656 56128 56320 61390 62464 67529 68320 70160 75152 77176 78080 78848 85888 93940 96470 98224 98560 106994 107360 109312 112256 122780 135058 136640 140320 150304 154352 156160 171776 187880 192940 196448 197120 213988 214720 218624 224512 245560 267485 270116 273280 280640 300608 308704 312320 337645 343552 374479 375760 385880 392896 394240 427976 429440 437248 449024 491120 534970 540232 546560 561280 588467 601216 617408 675290 687104 748958 751520 771760 785792 855952 858880 898048 982240 1069940 1080464 1093120 1122560 1176934 1202432 1234816 1350580 1497916 1503040 1543520 1571584 1711904 1717760 1872395 1964480 2139880 2160928 2186240 2245120 2353868 2404864 2469632 2701160 2942335 2995832 3006080 3087040 3143168 3423808 3435520 3744790 3928960 4119269 4279760 4321856 4490240 4707736 4809728 4939264 5402320 5884670 5991664 6012160 6174080 6286336 6847616 7489580 7857920 8238538 8559520 8643712 9415472 9878528 10804640 11769340 11983328 12024320 12348160 13695232 14979160 15715840 16477076 17119040 17287424 18830944 20596345 21609280 23538680 23966656 24048640 24696320 27390464 29958320 31431680 32954152 34238080 34574848 37661888 41192690 43218560 47077360 47933312 49392640 54780928 59916640 65908304 68476160 69149696 75323776 82385380 86437120 94154720 95866624 119833280 131816608 136952320 150647552 164770760 172874240 188309440 191733248 239666560 263633216 273904640 301295104 329541520 345748480 376618880 383466496 479333120 527266432 602590208 659083040 753237760 958666240 1054532864 1318166080 1506475520 1917332480 2109065728 2636332160 3012951040 4218131456 5272664320 10545328640 21090657280
• Sum of all divisors σ(n): 64183963392
• Sum of proper divisors (its aliquot sum) s(n): 43093306112
• 21090657280 is an abundant number, because the sum of its proper divisors (43093306112) is greater than itself. Its abundance is 22002648832

Bases of 21090657280

• Binary: 10011101001000110011110010000000000₂
• Hexadecimal: 0x4E919E400
• Base-36: 9OSTZB4

Squares and roots of 21090657280

• 21090657280 squared (21090657280²) is 444815824502416998400
• 21090657280 cubed (21090657280³) is 9381458107301103444900708352000
• The square root of 21090657280 is 145226.2279342131
• The cube root of 21090657280 is 2762.8885811977

Scales and comparisons

• 21,090,657,280 seconds is equal to 670 years, 32 weeks, 19 hours, 54 minutes, 40 seconds.
• To count from 1 to 21,090,657,280 would take you about one thousand, three hundred forty-one 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 21090657280 cubic inches would be around 230.2 feet tall.

Recreational maths with 21090657280

• 21090657280 backwards is 08275609012
• 21090657280 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21090657280's digits is 40
• More coming soon!