18168344 has 32 divisors (see below), whose sum is σ = 35773920. Its totient is φ = 8633856.

The previous prime is 18168343. The next prime is 18168349. The reversal of 18168344 is 44386181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18168343) 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, 53744 + ... + 54080.

It is an arithmetic number, because the mean of its divisors is an integer number (1117935).

Almost surely, 2^18168344 is an apocalyptic number.

It is an amenable number.

18168344 is a deficient number, since it is larger than the sum of its proper divisors (17605576).

18168344 is a wasteful number, since it uses less digits than its factorization.

18168344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659 (or 655 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 18168344 is about 4262.4340464106. The cubic root of 18168344 is about 262.8886168316. Note that the first 3 decimals are identical.

The spelling of 18168344 in words is "eighteen million, one hundred sixty-eight thousand, three hundred forty-four".