18084636 has 36 divisors (see below), whose sum is σ = 45936072. Its totient is φ = 5998944.

The previous prime is 18084629. The next prime is 18084641. The reversal of 18084636 is 63648081.

It is a happy number.

18084636 is a `hidden beast` number, since 18 + 0 + 8 + 4 + 636 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18084636.

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 11 ways as a sum of consecutive naturals, for example, 7066 + ... + 9278.

It is an arithmetic number, because the mean of its divisors is an integer number (1276002).

Almost surely, 2^18084636 is an apocalyptic number.

It is an amenable number.

18084636 is an abundant number, since it is smaller than the sum of its proper divisors (27851436).

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

18084636 is a wasteful number, since it uses less digits than its factorization.

18084636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2450 (or 2445 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 18084636 is about 4252.6034378954. The cubic root of 18084636 is about 262.4842548379.

The spelling of 18084636 in words is "eighteen million, eighty-four thousand, six hundred thirty-six".