18344386 has 32 divisors (see below), whose sum is σ = 30643200. Its totient is φ = 8197200.

The previous prime is 18344383. The next prime is 18344387. The reversal of 18344386 is 68344381.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (18344383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121411 + ... + 121561.

It is an arithmetic number, because the mean of its divisors is an integer number (957600).

Almost surely, 2^18344386 is an apocalyptic number.

18344386 is a deficient number, since it is larger than the sum of its proper divisors (12298814).

18344386 is a wasteful number, since it uses less digits than its factorization.

18344386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334.

The product of its digits is 55296, while the sum is 37.

The square root of 18344386 is about 4283.0346718186. The cubic root of 18344386 is about 263.7349746987.

The spelling of 18344386 in words is "eighteen million, three hundred forty-four thousand, three hundred eighty-six".