18045858 has 32 divisors (see below), whose sum is σ = 38649600. Its totient is φ = 5600016.

The previous prime is 18045851. The next prime is 18045889. The reversal of 18045858 is 85854081.

It is not an unprimeable number, because it can be changed into a prime (18045851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5385 + ... + 8067.

It is an arithmetic number, because the mean of its divisors is an integer number (1207800).

Almost surely, 2^18045858 is an apocalyptic number.

18045858 is an abundant number, since it is smaller than the sum of its proper divisors (20603742).

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

18045858 is a wasteful number, since it uses less digits than its factorization.

18045858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2766.

The product of its (nonzero) digits is 51200, while the sum is 39.

The square root of 18045858 is about 4248.0416664623. The cubic root of 18045858 is about 262.2965098688.

The spelling of 18045858 in words is "eighteen million, forty-five thousand, eight hundred fifty-eight".