18522636 has 48 divisors (see below), whose sum is σ = 49206528. Its totient is φ = 5368000.

The previous prime is 18522629. The next prime is 18522641. The reversal of 18522636 is 63622581.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 18522597 and 18522606.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15 + ... + 6086.

It is an arithmetic number, because the mean of its divisors is an integer number (1025136).

Almost surely, 2^18522636 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 18522636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24603264).

18522636 is an abundant number, since it is smaller than the sum of its proper divisors (30683892).

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

18522636 is a wasteful number, since it uses less digits than its factorization.

18522636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6142 (or 6140 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 18522636 is about 4303.7932106457. The cubic root of 18522636 is about 264.5864488249.

The spelling of 18522636 in words is "eighteen million, five hundred twenty-two thousand, six hundred thirty-six".