18678274 has 16 divisors (see below), whose sum is σ = 29776248. Its totient is φ = 8756992.

The previous prime is 18678269. The next prime is 18678281. The reversal of 18678274 is 47287681.

It can be written as a sum of positive squares in 4 ways, for example, as 13638249 + 5040025 = 3693^2 + 2245^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18678274.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9912 + ... + 11644.

Almost surely, 2^18678274 is an apocalyptic number.

18678274 is a deficient number, since it is larger than the sum of its proper divisors (11097974).

18678274 is a wasteful number, since it uses less digits than its factorization.

18678274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069.

The product of its digits is 150528, while the sum is 43.

The square root of 18678274 is about 4321.8368779953. The cubic root of 18678274 is about 265.3254527567.

The spelling of 18678274 in words is "eighteen million, six hundred seventy-eight thousand, two hundred seventy-four".