18649156 has 12 divisors (see below), whose sum is σ = 32837392. Its totient is φ = 9267048.

The previous prime is 18649151. The next prime is 18649193. The reversal of 18649156 is 65194681.

It is not an unprimeable number, because it can be changed into a prime (18649151) 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, 13650 + ... + 14953.

Almost surely, 2^18649156 is an apocalyptic number.

It is an amenable number.

18649156 is a deficient number, since it is larger than the sum of its proper divisors (14188236).

18649156 is a wasteful number, since it uses less digits than its factorization.

18649156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28770 (or 28768 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 18649156 is about 4318.4668575780. The cubic root of 18649156 is about 265.1875070231.

The spelling of 18649156 in words is "eighteen million, six hundred forty-nine thousand, one hundred fifty-six".