18045646 has 8 divisors (see below), whose sum is σ = 27472680. Its totient is φ = 8888088.

The previous prime is 18045637. The next prime is 18045647. The reversal of 18045646 is 64654081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18045647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67201 + ... + 67468.

It is an arithmetic number, because the mean of its divisors is an integer number (3434085).

Almost surely, 2^18045646 is an apocalyptic number.

18045646 is a deficient number, since it is larger than the sum of its proper divisors (9427034).

18045646 is a wasteful number, since it uses less digits than its factorization.

18045646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134738.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 18045646 is about 4248.0167137148. The cubic root of 18045646 is about 262.2954827249.

The spelling of 18045646 in words is "eighteen million, forty-five thousand, six hundred forty-six".