18481804 has 12 divisors (see below), whose sum is σ = 35283528. Its totient is φ = 8400800.

The previous prime is 18481783. The next prime is 18481807. The reversal of 18481804 is 40818481.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18481804.

It is not an unprimeable number, because it can be changed into a prime (18481807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209977 + ... + 210064.

It is an arithmetic number, because the mean of its divisors is an integer number (2940294).

Almost surely, 2^18481804 is an apocalyptic number.

It is an amenable number.

18481804 is a deficient number, since it is larger than the sum of its proper divisors (16801724).

18481804 is a wasteful number, since it uses less digits than its factorization.

18481804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420056 (or 420054 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 34.

The square root of 18481804 is about 4299.0468711099. The cubic root of 18481804 is about 264.3918843250.

The spelling of 18481804 in words is "eighteen million, four hundred eighty-one thousand, eight hundred four".