18045636 has 48 divisors (see below), whose sum is σ = 50956416. Its totient is φ = 4852224.

The previous prime is 18045631. The next prime is 18045637. The reversal of 18045636 is 63654081.

It is a junction number, because it is equal to n+sod(n) for n = 18045597 and 18045606.

It is not an unprimeable number, because it can be changed into a prime (18045631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4891 + ... + 7746.

It is an arithmetic number, because the mean of its divisors is an integer number (1061592).

Almost surely, 2^18045636 is an apocalyptic number.

It is an amenable number.

18045636 is an abundant number, since it is smaller than the sum of its proper divisors (32910780).

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

18045636 is a wasteful number, since it uses less digits than its factorization.

18045636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12668 (or 12666 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 18045636 is about 4248.0155366948. The cubic root of 18045636 is about 262.2954342745.

It can be divided in two parts, 18045 and 636, that added together give a palindrome (18681).

The spelling of 18045636 in words is "eighteen million, forty-five thousand, six hundred thirty-six".