18204045 has 16 divisors (see below), whose sum is σ = 29538432. Its totient is φ = 9571520.

The previous prime is 18204029. The next prime is 18204077. The reversal of 18204045 is 54040281.

It is not a de Polignac number, because 18204045 - 2⁴ = 18204029 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7482 + ... + 9611.

It is an arithmetic number, because the mean of its divisors is an integer number (1846152).

Almost surely, 2^18204045 is an apocalyptic number.

18204045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18204045 is a deficient number, since it is larger than the sum of its proper divisors (11334387).

18204045 is a wasteful number, since it uses less digits than its factorization.

18204045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17172.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 18204045 is about 4266.6198565141. The cubic root of 18204045 is about 263.0606971957.

The spelling of 18204045 in words is "eighteen million, two hundred four thousand, forty-five".