18861811204 has 24 divisors (see below), whose sum is σ = 35176151808. Its totient is φ = 8828930880.

The previous prime is 18861811201. The next prime is 18861811211. The reversal of 18861811204 is 40211816881.

It is not an unprimeable number, because it can be changed into a prime (18861811201) 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, 2176737 + ... + 2185384.

It is an arithmetic number, because the mean of its divisors is an integer number (1465672992).

Almost surely, 2^18861811204 is an apocalyptic number.

It is an amenable number.

18861811204 is a deficient number, since it is larger than the sum of its proper divisors (16314340604).

18861811204 is a wasteful number, since it uses less digits than its factorization.

18861811204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4362195 (or 4362193 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 40.

The spelling of 18861811204 in words is "eighteen billion, eight hundred sixty-one million, eight hundred eleven thousand, two hundred four".