18316087 has 4 divisors (see below), whose sum is σ = 18333000. Its totient is φ = 18299176.

The previous prime is 18316063. The next prime is 18316093. The reversal of 18316087 is 78061381.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18316087 - 2⁷ = 18315959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18316007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6712 + ... + 9037.

It is an arithmetic number, because the mean of its divisors is an integer number (4583250).

Almost surely, 2^18316087 is an apocalyptic number.

18316087 is a deficient number, since it is larger than the sum of its proper divisors (16913).

18316087 is a wasteful number, since it uses less digits than its factorization.

18316087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16912.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 18316087 is about 4279.7297811895. The cubic root of 18316087 is about 263.5992878248.

The spelling of 18316087 in words is "eighteen million, three hundred sixteen thousand, eighty-seven".