18458872 has 16 divisors (see below), whose sum is σ = 36646560. Its totient is φ = 8686464.

The previous prime is 18458863. The next prime is 18458873. The reversal of 18458872 is 27885481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18458873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67728 + ... + 67999.

It is an arithmetic number, because the mean of its divisors is an integer number (2290410).

Almost surely, 2^18458872 is an apocalyptic number.

It is an amenable number.

18458872 is a deficient number, since it is larger than the sum of its proper divisors (18187688).

18458872 is a wasteful number, since it uses less digits than its factorization.

18458872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135750 (or 135746 counting only the distinct ones).

The product of its digits is 143360, while the sum is 43.

The square root of 18458872 is about 4296.3789404567. The cubic root of 18458872 is about 264.2824876437.

The spelling of 18458872 in words is "eighteen million, four hundred fifty-eight thousand, eight hundred seventy-two".