18536394 has 16 divisors (see below), whose sum is σ = 38351520. Its totient is φ = 5965680.

The previous prime is 18536389. The next prime is 18536417. The reversal of 18536394 is 49363581.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53092 + ... + 53439.

It is an arithmetic number, because the mean of its divisors is an integer number (2396970).

Almost surely, 2^18536394 is an apocalyptic number.

18536394 is an abundant number, since it is smaller than the sum of its proper divisors (19815126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18536394 is a wasteful number, since it uses less digits than its factorization.

18536394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106565.

The product of its digits is 77760, while the sum is 39.

The square root of 18536394 is about 4305.3912714177. The cubic root of 18536394 is about 264.6519412935.

The spelling of 18536394 in words is "eighteen million, five hundred thirty-six thousand, three hundred ninety-four".