18811453394 has 32 divisors (see below), whose sum is σ = 31287326976. Its totient is φ = 8437327360.

The previous prime is 18811453363. The next prime is 18811453433. The reversal of 18811453394 is 49335411881.

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, 176939 + ... + 262545.

It is an arithmetic number, because the mean of its divisors is an integer number (977728968).

Almost surely, 2^18811453394 is an apocalyptic number.

18811453394 is a deficient number, since it is larger than the sum of its proper divisors (12475873582).

18811453394 is a wasteful number, since it uses less digits than its factorization.

18811453394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85930.

The product of its digits is 414720, while the sum is 47.

The spelling of 18811453394 in words is "eighteen billion, eight hundred eleven million, four hundred fifty-three thousand, three hundred ninety-four".