18274836 has 24 divisors (see below), whose sum is σ = 42777280. Its totient is φ = 6072192.

The previous prime is 18274829. The next prime is 18274849. The reversal of 18274836 is 63847281.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18274794 and 18274803.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1785 + ... + 6303.

Almost surely, 2^18274836 is an apocalyptic number.

It is an amenable number.

18274836 is an abundant number, since it is smaller than the sum of its proper divisors (24502444).

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

18274836 is a wasteful number, since it uses less digits than its factorization.

18274836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4863 (or 4861 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 18274836 is about 4274.9077183022. The cubic root of 18274836 is about 263.4012486616.

It can be divided in two parts, 18274 and 836, that added together give a triangular number (19110 = T₁₉₅).

The spelling of 18274836 in words is "eighteen million, two hundred seventy-four thousand, eight hundred thirty-six".