18450636 has 24 divisors (see below), whose sum is σ = 43143744. Its totient is φ = 6137040.

The previous prime is 18450631. The next prime is 18450637. The reversal of 18450636 is 63605481.

It is a junction number, because it is equal to n+sod(n) for n = 18450597 and 18450606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18450631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5391 + ... + 8121.

It is an arithmetic number, because the mean of its divisors is an integer number (1797656).

Almost surely, 2^18450636 is an apocalyptic number.

It is an amenable number.

18450636 is an abundant number, since it is smaller than the sum of its proper divisors (24693108).

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

18450636 is a wasteful number, since it uses less digits than its factorization.

18450636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3301 (or 3299 counting only the distinct ones).

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

The square root of 18450636 is about 4295.4203519563. The cubic root of 18450636 is about 264.2431758451.

The spelling of 18450636 in words is "eighteen million, four hundred fifty thousand, six hundred thirty-six".