18504090 has 48 divisors (see below), whose sum is σ = 52487136. Its totient is φ = 4485600.

The previous prime is 18504077. The next prime is 18504133. The reversal of 18504090 is 9040581.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8356 + ... + 10335.

It is an arithmetic number, because the mean of its divisors is an integer number (1093482).

Almost surely, 2^18504090 is an apocalyptic number.

18504090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18504090 is an abundant number, since it is smaller than the sum of its proper divisors (33983046).

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

18504090 is a wasteful number, since it uses less digits than its factorization.

18504090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18715 (or 18712 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 18504090 is about 4301.6380600883. The cubic root of 18504090 is about 264.4981126052.

The spelling of 18504090 in words is "eighteen million, five hundred four thousand, ninety".