18505375842 has 16 divisors (see below), whose sum is σ = 37638053280. Its totient is φ = 6063908352.

The previous prime is 18505375807. The next prime is 18505375873. The reversal of 18505375842 is 24857350581.

It is a junction number, because it is equal to n+sod(n) for n = 18505375791 and 18505375800.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26137183 + ... + 26137890.

It is an arithmetic number, because the mean of its divisors is an integer number (2352378330).

Almost surely, 2^18505375842 is an apocalyptic number.

18505375842 is an abundant number, since it is smaller than the sum of its proper divisors (19132677438).

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

18505375842 is a wasteful number, since it uses less digits than its factorization.

18505375842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52275137.

The product of its (nonzero) digits is 1344000, while the sum is 48.

The spelling of 18505375842 in words is "eighteen billion, five hundred five million, three hundred seventy-five thousand, eight hundred forty-two".