21123516672

Names of 21123516672

• Cardinal: 21123516672 can be written as Twenty-one billion, one hundred twenty-three million, five hundred sixteen thousand, six hundred seventy-two.

Scientific notation

• Scientific notation: 2.1123516672 × 10¹⁰

Factors of 21123516672

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 223

Divisors of 21123516672

• Number of divisors d(n): 216
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 32 36 37 48 64 72 74 96 111 128 144 148 181 192 222 256 288 296 333 362 384 444 543 576 592 666 724 768 888 1086 1152 1184 1332 1369 1448 1629 1776 2172 2304 2368 2664 2738 2896 3258 3552 4107 4344 4736 5328 5476 5792 6516 6697 7104 8214 8688 9472 10656 10952 11584 12321 13032 13394 14208 16428 17376 20091 21312 21904 23168 24642 26064 26788 28416 32856 34752 40182 42624 43808 46336 49284 50653 52128 53576 60273 65712 69504 80364 85248 87616 98568 101306 104256 107152 120546 131424 139008 151959 160728 175232 197136 202612 208512 214304 241092 247789 262848 303918 321456 350464 394272 405224 417024 428608 455877 482184 495578 525696 607836 642912 743367 788544 810448 857216 911754 964368 991156 1051392 1215672 1285824 1486734 1577088 1620896 1714432 1823508 1928736 1982312 2230101 2431344 2571648 2973468 3154176 3241792 3647016 3857472 3964624 4460202 4862688 5143296 5946936 6483584 7294032 7714944 7929248 8920404 9168193 9725376 11893872 12967168 14588064 15429888 15858496 17840808 18336386 19450752 23787744 27504579 29176128 31716992 35681616 36672772 38901504 47575488 55009158 58352256 63433984 71363232 73345544 82513737 95150976 110018316 116704512 142726464 146691088 165027474 190301952 220036632 285452928 293382176 330054948 440073264 570905856 586764352 660109896 880146528 1173528704 1320219792 1760293056 2347057408 2640439584 3520586112 5280879168 7041172224 10561758336 21123516672
• Sum of all divisors σ(n): 62941893560
• Sum of proper divisors (its aliquot sum) s(n): 41818376888
• 21123516672 is an abundant number, because the sum of its proper divisors (41818376888) is greater than itself. Its abundance is 20694860216

Bases of 21123516672

• Binary: 10011101011000011110100100100000000₂
• Hexadecimal: 0x4EB0F4900
• Base-36: 9PCE9S0

Squares and roots of 21123516672

• 21123516672 squared (21123516672²) is 446202956592261955584
• 21123516672 cubed (21123516672³) is 9425375592672337724969947496448
• The square root of 21123516672 is 145339.3156444601
• The cube root of 21123516672 is 2764.3227032619

Scales and comparisons

• 21,123,516,672 seconds is equal to 671 years, 34 weeks, 3 days, 3 hours, 31 minutes, 12 seconds.
• To count from 1 to 21,123,516,672 would take you about one thousand, three hundred forty-three 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 21123516672 cubic inches would be around 230.4 feet tall.

Recreational maths with 21123516672

• 21123516672 backwards is 27661532112
• 21123516672 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21123516672's digits is 36
• More coming soon!