18000522 has 32 divisors (see below), whose sum is σ = 41295360. Its totient is φ = 5806080.

The previous prime is 18000473. The next prime is 18000527. The reversal of 18000522 is 22500081.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 18000495 and 18000504.

It is not an unprimeable number, because it can be changed into a prime (18000527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3703 + ... + 7050.

It is an arithmetic number, because the mean of its divisors is an integer number (1290480).

Almost surely, 2^18000522 is an apocalyptic number.

18000522 is an abundant number, since it is smaller than the sum of its proper divisors (23294838).

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

18000522 is a wasteful number, since it uses less digits than its factorization.

18000522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10795 (or 10789 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 18000522 is about 4242.7022049632. The cubic root of 18000522 is about 262.0766727797.

The spelling of 18000522 in words is "eighteen million, five hundred twenty-two", and thus it is an aban number.