18618344 has 8 divisors (see below), whose sum is σ = 34909410. Its totient is φ = 9309168.

The previous prime is 18618343. The next prime is 18618367. The reversal of 18618344 is 44381681.

It can be written as a sum of positive squares in only one way, i.e., 12517444 + 6100900 = 3538^2 + 2470^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (18618343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1163639 + ... + 1163654.

Almost surely, 2^18618344 is an apocalyptic number.

It is an amenable number.

18618344 is a deficient number, since it is larger than the sum of its proper divisors (16291066).

18618344 is a wasteful number, since it uses less digits than its factorization.

18618344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2327299 (or 2327295 counting only the distinct ones).

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

The square root of 18618344 is about 4314.8979130450. The cubic root of 18618344 is about 265.0413795594.

The spelling of 18618344 in words is "eighteen million, six hundred eighteen thousand, three hundred forty-four".