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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".