18032636 has 12 divisors (see below), whose sum is σ = 31625328. Its totient is φ = 8996832.

The previous prime is 18032587. The next prime is 18032647. The reversal of 18032636 is 63623081.

It is a super-2 number, since 2×18032636² = 650351922216992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18032599 and 18032608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2681 + ... + 6576.

It is an arithmetic number, because the mean of its divisors is an integer number (2635444).

Almost surely, 2^18032636 is an apocalyptic number.

It is an amenable number.

18032636 is a deficient number, since it is larger than the sum of its proper divisors (13592692).

18032636 is a wasteful number, since it uses less digits than its factorization.

18032636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9748 (or 9746 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 18032636 is about 4246.4851347909. The cubic root of 18032636 is about 262.2324336358.

The spelling of 18032636 in words is "eighteen million, thirty-two thousand, six hundred thirty-six".