18549260418 has 32 divisors (see below), whose sum is σ = 40325656896. Its totient is φ = 5654121408.

The previous prime is 18549260383. The next prime is 18549260423. The reversal of 18549260418 is 81406294581.

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 15 ways as a sum of consecutive naturals, for example, 1102921 + ... + 1119612.

It is an arithmetic number, because the mean of its divisors is an integer number (1260176778).

Almost surely, 2^18549260418 is an apocalyptic number.

18549260418 is an abundant number, since it is smaller than the sum of its proper divisors (21776396478).

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

18549260418 is a wasteful number, since it uses less digits than its factorization.

18549260418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222658.

The product of its (nonzero) digits is 552960, while the sum is 48.

The spelling of 18549260418 in words is "eighteen billion, five hundred forty-nine million, two hundred sixty thousand, four hundred eighteen".