18522516 has 12 divisors (see below), whose sum is σ = 43219232. Its totient is φ = 6174168.

The previous prime is 18522487. The next prime is 18522527. The reversal of 18522516 is 61522581.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771760 + ... + 771783.

Almost surely, 2^18522516 is an apocalyptic number.

It is an amenable number.

18522516 is an abundant number, since it is smaller than the sum of its proper divisors (24696716).

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

18522516 is a wasteful number, since it uses less digits than its factorization.

18522516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543550 (or 1543548 counting only the distinct ones).

The product of its digits is 4800, while the sum is 30.

The square root of 18522516 is about 4303.7792694329. The cubic root of 18522516 is about 264.5858774440.

The spelling of 18522516 in words is "eighteen million, five hundred twenty-two thousand, five hundred sixteen".