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20858543112 = 23311191569727
BaseRepresentation
bin10011011011010001…
…000001110000001000
31222211200000202222210
4103123101001300020
5320204241334422
613325434545120
71335615456021
oct233321016010
958750022883
1020858543112
118934116190
1240615981a0
131c75517604
14101c32dc48
1582130910c
hex4db441c08

20858543112 has 128 divisors (see below), whose sum is σ = 57364070400. Its totient is φ = 6267993600.

The previous prime is 20858543077. The next prime is 20858543143. The reversal of 20858543112 is 21134585802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28690893 + ... + 28691619.

It is an arithmetic number, because the mean of its divisors is an integer number (448156800).

Almost surely, 220858543112 is an apocalyptic number.

20858543112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20858543112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28682035200).

20858543112 is an abundant number, since it is smaller than the sum of its proper divisors (36505527288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20858543112 is a wasteful number, since it uses less digits than its factorization.

20858543112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507 (or 1503 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 39.

The spelling of 20858543112 in words is "twenty billion, eight hundred fifty-eight million, five hundred forty-three thousand, one hundred twelve".

Divisors: 1 2 3 4 6 8 11 12 22 24 33 44 66 88 132 191 264 382 569 573 727 764 1138 1146 1454 1528 1707 2101 2181 2276 2292 2908 3414 4202 4362 4552 4584 5816 6259 6303 6828 7997 8404 8724 12518 12606 13656 15994 16808 17448 18777 23991 25036 25212 31988 37554 47982 50072 50424 63976 75108 95964 108679 138857 150216 191928 217358 277714 326037 413663 416571 434716 555428 652074 827326 833142 869432 1110856 1195469 1240989 1304148 1527427 1654652 1666284 2390938 2481978 2608296 3054854 3309304 3332568 3586407 4550293 4582281 4781876 4963956 6109708 7172814 9100586 9164562 9563752 9927912 12219416 13650879 14345628 18201172 18329124 27301758 28691256 36402344 36658248 54603516 79009633 109207032 158019266 237028899 316038532 474057798 632077064 869105963 948115596 1738211926 1896231192 2607317889 3476423852 5214635778 6952847704 10429271556 20858543112