21234728988

Names of 21234728988

• Cardinal: 21234728988 can be written as Twenty-one billion, two hundred thirty-four million, seven hundred twenty-eight thousand, nine hundred eighty-eight.

Scientific notation

• Scientific notation: 2.1234728988 × 10¹⁰

Factors of 21234728988

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 759

Divisors of 21234728988

• Number of divisors d(n): 198
• Complete list of divisors:
  1 2 3 4 6 9 11 12 18 22 27 33 36 44 54 66 81 99 108 121 132 162 198 242 243 297 324 363 396 484 486 594 726 729 743 891 972 1089 1188 1452 1458 1486 1782 2178 2187 2229 2673 2916 2972 3267 3564 4356 4374 4458 5346 6534 6561 6687 8019 8173 8748 8916 9801 10692 13068 13122 13374 16038 16346 19602 19683 20061 24057 24519 26244 26748 29403 32076 32692 39204 39366 40122 48114 49038 58806 59049 60183 72171 73557 78732 80244 88209 89903 96228 98076 117612 118098 120366 144342 147114 176418 179806 180549 216513 220671 236196 240732 264627 269709 288684 294228 352836 359612 361098 433026 441342 529254 539418 541647 649539 662013 722196 793881 809127 866052 882684 1058508 1078836 1083294 1299078 1324026 1587762 1618254 1624941 1986039 2166588 2381643 2427381 2598156 2648052 3175524 3236508 3249882 3972078 4763286 4854762 4874823 5958117 6499764 7144929 7282143 7944156 9526572 9709524 9749646 11916234 14289858 14564286 14624469 17874351 19499292 21846429 23832468 28579716 29128572 29248938 35748702 43692858 43873407 53623053 58497876 65539287 71497404 87385716 87746814 107246106 131078574 160869159 175493628 196617861 214492212 262157148 321738318 393235722 482607477 589853583 643476636 786471444 965214954 1179707166 1769560749 1930429908 2359414332 3539121498 5308682247 7078242996 10617364494 21234728988
• Sum of all divisors σ(n): 61351328472
• Sum of proper divisors (its aliquot sum) s(n): 40116599484
• 21234728988 is an abundant number, because the sum of its proper divisors (40116599484) is greater than itself. Its abundance is 18881870496

Bases of 21234728988

• Binary: 10011110001101100000100000000011100₂
• Hexadecimal: 0x4F1B0401C
• Base-36: 9R6LXR0

Squares and roots of 21234728988

• 21234728988 squared (21234728988²) is 450913715193807504144
• 21234728988 cubed (21234728988³) is 9575030539112720246338526926272
• The square root of 21234728988 is 145721.4088183339
• The cube root of 21234728988 is 2769.1654698641

Scales and comparisons

• 21,234,728,988 seconds is equal to 675 years, 10 weeks, 2 days, 7 hours, 49 minutes, 48 seconds.
• To count from 1 to 21,234,728,988 would take you about one thousand, three hundred fifty 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 21234728988 cubic inches would be around 230.8 feet tall.

Recreational maths with 21234728988

• 21234728988 backwards is 88982743212
• 21234728988 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21234728988's digits is 54
• More coming soon!