18274422 has 16 divisors (see below), whose sum is σ = 38698992. Its totient is φ = 5733120.

The previous prime is 18274387. The next prime is 18274433. The reversal of 18274422 is 22447281.

It is a self number, because there is not a number n which added to its sum of digits gives 18274422.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89479 + ... + 89682.

It is an arithmetic number, because the mean of its divisors is an integer number (2418687).

Almost surely, 2^18274422 is an apocalyptic number.

18274422 is an abundant number, since it is smaller than the sum of its proper divisors (20424570).

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

18274422 is a wasteful number, since it uses less digits than its factorization.

18274422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179183.

The product of its digits is 7168, while the sum is 30.

The square root of 18274422 is about 4274.8592959301. The cubic root of 18274422 is about 263.3992596069.

The spelling of 18274422 in words is "eighteen million, two hundred seventy-four thousand, four hundred twenty-two".