18682506 has 12 divisors (see below), whose sum is σ = 40478802. Its totient is φ = 6227496.

The previous prime is 18682501. The next prime is 18682577. The reversal of 18682506 is 60528681.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17264025 + 1418481 = 4155^2 + 1191^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18682501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 518941 + ... + 518976.

Almost surely, 2^18682506 is an apocalyptic number.

18682506 is an abundant number, since it is smaller than the sum of its proper divisors (21796296).

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

18682506 is a wasteful number, since it uses less digits than its factorization.

18682506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037925 (or 1037922 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 18682506 is about 4322.3264568980. The cubic root of 18682506 is about 265.3454898066.

The spelling of 18682506 in words is "eighteen million, six hundred eighty-two thousand, five hundred six".