18722532 has 12 divisors (see below), whose sum is σ = 43685936. Its totient is φ = 6240840.

The previous prime is 18722513. The next prime is 18722549. The reversal of 18722532 is 23522781.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18722532.

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, 780094 + ... + 780117.

Almost surely, 2^18722532 is an apocalyptic number.

18722532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18722532 is an abundant number, since it is smaller than the sum of its proper divisors (24963404).

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

18722532 is a wasteful number, since it uses less digits than its factorization.

18722532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560218 (or 1560216 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 18722532 is about 4326.9541250168. The cubic root of 18722532 is about 265.5348495365.

The spelling of 18722532 in words is "eighteen million, seven hundred twenty-two thousand, five hundred thirty-two".