18396844 has 12 divisors (see below), whose sum is σ = 33064864. Its totient is φ = 8949744.

The previous prime is 18396821. The next prime is 18396863. The reversal of 18396844 is 44869381.

It is a self number, because there is not a number n which added to its sum of digits gives 18396844.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62004 + ... + 62299.

Almost surely, 2^18396844 is an apocalyptic number.

It is an amenable number.

18396844 is a deficient number, since it is larger than the sum of its proper divisors (14668020).

18396844 is a wasteful number, since it uses less digits than its factorization.

18396844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124344 (or 124342 counting only the distinct ones).

The product of its digits is 165888, while the sum is 43.

The square root of 18396844 is about 4289.1542289827. The cubic root of 18396844 is about 263.9861295131.

The spelling of 18396844 in words is "eighteen million, three hundred ninety-six thousand, eight hundred forty-four".