18522036 has 72 divisors (see below), whose sum is σ = 53100320. Its totient is φ = 5396544.

The previous prime is 18522029. The next prime is 18522059. The reversal of 18522036 is 63022581.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7851 + ... + 9933.

Almost surely, 2^18522036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18522036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26550160).

18522036 is an abundant number, since it is smaller than the sum of its proper divisors (34578284).

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

18522036 is a wasteful number, since it uses less digits than its factorization.

18522036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125 (or 2120 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 18522036 is about 4303.7235041299. The cubic root of 18522036 is about 264.5835918956.

The spelling of 18522036 in words is "eighteen million, five hundred twenty-two thousand, thirty-six".