18366844 has 24 divisors (see below), whose sum is σ = 34348160. Its totient is φ = 8567856.

The previous prime is 18366839. The next prime is 18366847. The reversal of 18366844 is 44866381.

It is a junction number, because it is equal to n+sod(n) for n = 18366797 and 18366806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18366847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3289 + ... + 6895.

Almost surely, 2^18366844 is an apocalyptic number.

It is an amenable number.

18366844 is a deficient number, since it is larger than the sum of its proper divisors (15981316).

18366844 is a wasteful number, since it uses less digits than its factorization.

18366844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3697 (or 3695 counting only the distinct ones).

The product of its digits is 110592, while the sum is 40.

The square root of 18366844 is about 4285.6556091221. The cubic root of 18366844 is about 263.8425561072.

The spelling of 18366844 in words is "eighteen million, three hundred sixty-six thousand, eight hundred forty-four".