18522087 has 8 divisors (see below), whose sum is σ = 24941040. Its totient is φ = 12225600.

The previous prime is 18522073. The next prime is 18522139. The reversal of 18522087 is 78022581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18522087 - 2¹² = 18517991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18522187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30262 + ... + 30867.

It is an arithmetic number, because the mean of its divisors is an integer number (3117630).

Almost surely, 2^18522087 is an apocalyptic number.

18522087 is a deficient number, since it is larger than the sum of its proper divisors (6418953).

18522087 is a wasteful number, since it uses less digits than its factorization.

18522087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61233.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 18522087 is about 4303.7294292276. The cubic root of 18522087 is about 264.5838347370.

The spelling of 18522087 in words is "eighteen million, five hundred twenty-two thousand, eighty-seven".