18546868 has 6 divisors (see below), whose sum is σ = 32457026. Its totient is φ = 9273432.

The previous prime is 18546851. The next prime is 18546887. The reversal of 18546868 is 86864581.

It can be written as a sum of positive squares in only one way, i.e., 17205904 + 1340964 = 4148^2 + 1158^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2318355 + ... + 2318362.

Almost surely, 2^18546868 is an apocalyptic number.

It is an amenable number.

18546868 is a deficient number, since it is larger than the sum of its proper divisors (13910158).

18546868 is a wasteful number, since it uses less digits than its factorization.

18546868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4636721 (or 4636719 counting only the distinct ones).

The product of its digits is 368640, while the sum is 46.

The square root of 18546868 is about 4306.6074815335. The cubic root of 18546868 is about 264.7017791511.

The spelling of 18546868 in words is "eighteen million, five hundred forty-six thousand, eight hundred sixty-eight".