18381084 has 24 divisors (see below), whose sum is σ = 42958608. Its totient is φ = 6117120.

The previous prime is 18381059. The next prime is 18381107. The reversal of 18381084 is 48018381.

It is a happy number.

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, 13524 + ... + 14820.

It is an arithmetic number, because the mean of its divisors is an integer number (1789942).

Almost surely, 2^18381084 is an apocalyptic number.

It is an amenable number.

18381084 is an abundant number, since it is smaller than the sum of its proper divisors (24577524).

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

18381084 is a wasteful number, since it uses less digits than its factorization.

18381084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2485 (or 2483 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 18381084 is about 4287.3166433097. The cubic root of 18381084 is about 263.9107250940.

The spelling of 18381084 in words is "eighteen million, three hundred eighty-one thousand, eighty-four".