18513231474 has 32 divisors (see below), whose sum is σ = 37825134336. Its totient is φ = 6038040960.

The previous prime is 18513231431. The next prime is 18513231487. The reversal of 18513231474 is 47413231581.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1289214 + ... + 1303494.

It is an arithmetic number, because the mean of its divisors is an integer number (1182035448).

Almost surely, 2^18513231474 is an apocalyptic number.

18513231474 is an abundant number, since it is smaller than the sum of its proper divisors (19311902862).

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

18513231474 is a wasteful number, since it uses less digits than its factorization.

18513231474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18930.

The product of its digits is 80640, while the sum is 39.

The spelling of 18513231474 in words is "eighteen billion, five hundred thirteen million, two hundred thirty-one thousand, four hundred seventy-four".