18340916 has 12 divisors (see below), whose sum is σ = 35014560. Its totient is φ = 8336760.

The previous prime is 18340891. The next prime is 18340939. The reversal of 18340916 is 61904381.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208376 + ... + 208463.

It is an arithmetic number, because the mean of its divisors is an integer number (2917880).

Almost surely, 2^18340916 is an apocalyptic number.

It is an amenable number.

18340916 is a deficient number, since it is larger than the sum of its proper divisors (16673644).

18340916 is a wasteful number, since it uses less digits than its factorization.

18340916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416854 (or 416852 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 18340916 is about 4282.6295660493. The cubic root of 18340916 is about 263.7183443960.

The spelling of 18340916 in words is "eighteen million, three hundred forty thousand, nine hundred sixteen".