18361875804 has 24 divisors (see below), whose sum is σ = 45099344640. Its totient is φ = 5798487024.

The previous prime is 18361875803. The next prime is 18361875827. The reversal of 18361875804 is 40857816381.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18361875803) 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, 40267044 + ... + 40267499.

It is an arithmetic number, because the mean of its divisors is an integer number (1879139360).

Almost surely, 2^18361875804 is an apocalyptic number.

It is an amenable number.

18361875804 is an abundant number, since it is smaller than the sum of its proper divisors (26737468836).

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

18361875804 is a wasteful number, since it uses less digits than its factorization.

18361875804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80534569 (or 80534567 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 51.

The spelling of 18361875804 in words is "eighteen billion, three hundred sixty-one million, eight hundred seventy-five thousand, eight hundred four".