18444858 has 32 divisors (see below), whose sum is σ = 39147840. Its totient is φ = 5777280.

The previous prime is 18444851. The next prime is 18444887. The reversal of 18444858 is 85844481.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18444851) 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, 15028 + ... + 16208.

It is an arithmetic number, because the mean of its divisors is an integer number (1223370).

Almost surely, 2^18444858 is an apocalyptic number.

18444858 is an abundant number, since it is smaller than the sum of its proper divisors (20702982).

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

18444858 is a wasteful number, since it uses less digits than its factorization.

18444858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342.

The product of its digits is 163840, while the sum is 42.

The square root of 18444858 is about 4294.7477225094. The cubic root of 18444858 is about 264.2155895065.

The spelling of 18444858 in words is "eighteen million, four hundred forty-four thousand, eight hundred fifty-eight".