18449668 has 12 divisors (see below), whose sum is σ = 32326812. Its totient is φ = 9213440.

The previous prime is 18449663. The next prime is 18449677. The reversal of 18449668 is 86694481.

It can be written as a sum of positive squares in 2 ways, for example, as 14197824 + 4251844 = 3768^2 + 2062^2 .

It is not an unprimeable number, because it can be changed into a prime (18449663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1548 + ... + 6268.

It is an arithmetic number, because the mean of its divisors is an integer number (2693901).

Almost surely, 2^18449668 is an apocalyptic number.

It is an amenable number.

18449668 is a deficient number, since it is larger than the sum of its proper divisors (13877144).

18449668 is a wasteful number, since it uses less digits than its factorization.

18449668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5702 (or 5700 counting only the distinct ones).

The product of its digits is 331776, while the sum is 46.

The square root of 18449668 is about 4295.3076723327. The cubic root of 18449668 is about 264.2385546518.

The spelling of 18449668 in words is "eighteen million, four hundred forty-nine thousand, six hundred sixty-eight".