18575432008 has 32 divisors (see below), whose sum is σ = 39809180160. Its totient is φ = 7959962880.

The previous prime is 18575431993. The next prime is 18575432009. The reversal of 18575432008 is 80023457581.

It is not an unprimeable number, because it can be changed into a prime (18575432009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 687360 + ... + 713872.

It is an arithmetic number, because the mean of its divisors is an integer number (1244036880).

Almost surely, 2^18575432008 is an apocalyptic number.

It is an amenable number.

18575432008 is an abundant number, since it is smaller than the sum of its proper divisors (21233748152).

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

18575432008 is a wasteful number, since it uses less digits than its factorization.

18575432008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39037 (or 39033 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 43.

Adding to 18575432008 its reverse (80023457581), we get a palindrome (98598889589).

The spelling of 18575432008 in words is "eighteen billion, five hundred seventy-five million, four hundred thirty-two thousand, eight".