18404036 has 24 divisors (see below), whose sum is σ = 36945216. Its totient is φ = 7858080.

The previous prime is 18404021. The next prime is 18404041. The reversal of 18404036 is 63040481.

It is a junction number, because it is equal to n+sod(n) for n = 18403996 and 18404014.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7526 + ... + 9666.

It is an arithmetic number, because the mean of its divisors is an integer number (1539384).

Almost surely, 2^18404036 is an apocalyptic number.

It is an amenable number.

18404036 is an abundant number, since it is smaller than the sum of its proper divisors (18541180).

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

18404036 is a wasteful number, since it uses less digits than its factorization.

18404036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2459 (or 2457 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 18404036 is about 4289.9925407861. The cubic root of 18404036 is about 264.0205256462.

The spelling of 18404036 in words is "eighteen million, four hundred four thousand, thirty-six".