18678996 has 54 divisors (see below), whose sum is σ = 54930330. Its totient is φ = 5336352.

The previous prime is 18678977. The next prime is 18679009. The reversal of 18678996 is 69987681.

It can be written as a sum of positive squares in only one way, i.e., 12744900 + 5934096 = 3570^2 + 2436^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3531 + ... + 7058.

Almost surely, 2^18678996 is an apocalyptic number.

It is an amenable number.

18678996 is an abundant number, since it is smaller than the sum of its proper divisors (36251334).

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

18678996 is a wasteful number, since it uses less digits than its factorization.

18678996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10613 (or 10601 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 18678996 is about 4321.9204064860. The cubic root of 18678996 is about 265.3288713901.

The spelling of 18678996 in words is "eighteen million, six hundred seventy-eight thousand, nine hundred ninety-six".