18204080 has 40 divisors (see below), whose sum is σ = 42518112. Its totient is φ = 7248384.

The previous prime is 18204079. The next prime is 18204089. The reversal of 18204080 is 8040281.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (18204089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24677 + ... + 25403.

Almost surely, 2^18204080 is an apocalyptic number.

18204080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18204080 is an abundant number, since it is smaller than the sum of its proper divisors (24314032).

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

18204080 is a wasteful number, since it uses less digits than its factorization.

18204080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053 (or 1047 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 18204080 is about 4266.6239581196. The cubic root of 18204080 is about 263.0608657867.

The spelling of 18204080 in words is "eighteen million, two hundred four thousand, eighty".