18326443 has 6 divisors (see below), whose sum is σ = 18635604. Its totient is φ = 18018396.

The previous prime is 18326437. The next prime is 18326489. The reversal of 18326443 is 34462381.

It is not a de Polignac number, because 18326443 - 2⁵ = 18326411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18326543) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34780 + ... + 35302.

It is an arithmetic number, because the mean of its divisors is an integer number (3105934).

Almost surely, 2^18326443 is an apocalyptic number.

18326443 is a deficient number, since it is larger than the sum of its proper divisors (309161).

18326443 is an frugal number, since it uses more digits than its factorization.

18326443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113 (or 590 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 18326443 is about 4280.9394996893. The cubic root of 18326443 is about 263.6489585486.

It can be divided in two parts, 18326 and 443, that added together give a square (18769 = 137²).

The spelling of 18326443 in words is "eighteen million, three hundred twenty-six thousand, four hundred forty-three".