18459190938 has 32 divisors (see below), whose sum is σ = 37320132096. Its totient is φ = 6086244528.

The previous prime is 18459190931. The next prime is 18459190957. The reversal of 18459190938 is 83909195481.

It is not an unprimeable number, because it can be changed into a prime (18459190931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 528781 + ... + 562607.

It is an arithmetic number, because the mean of its divisors is an integer number (1166254128).

Almost surely, 2^18459190938 is an apocalyptic number.

18459190938 is an abundant number, since it is smaller than the sum of its proper divisors (18860941158).

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

18459190938 is a wasteful number, since it uses less digits than its factorization.

18459190938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34818.

The product of its (nonzero) digits is 2799360, while the sum is 57.

The spelling of 18459190938 in words is "eighteen billion, four hundred fifty-nine million, one hundred ninety thousand, nine hundred thirty-eight".