18274506 has 16 divisors (see below), whose sum is σ = 37239264. Its totient is φ = 5976464.

The previous prime is 18274463. The next prime is 18274513. The reversal of 18274506 is 60547281.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28416 + ... + 29051.

It is an arithmetic number, because the mean of its divisors is an integer number (2327454).

Almost surely, 2^18274506 is an apocalyptic number.

18274506 is an abundant number, since it is smaller than the sum of its proper divisors (18964758).

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

18274506 is a wasteful number, since it uses less digits than its factorization.

18274506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57525.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 18274506 is about 4274.8691208036. The cubic root of 18274506 is about 263.3996631857.

The spelling of 18274506 in words is "eighteen million, two hundred seventy-four thousand, five hundred six".