18722522 has 16 divisors (see below), whose sum is σ = 34564992. Its totient is φ = 7406640.

The previous prime is 18722513. The next prime is 18722549. The reversal of 18722522 is 22522781.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51254 + ... + 51617.

It is an arithmetic number, because the mean of its divisors is an integer number (2160312).

Almost surely, 2^18722522 is an apocalyptic number.

18722522 is a deficient number, since it is larger than the sum of its proper divisors (15842470).

18722522 is a wasteful number, since it uses less digits than its factorization.

18722522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102893.

The product of its digits is 4480, while the sum is 29.

The square root of 18722522 is about 4326.9529694694. The cubic root of 18722522 is about 265.5348022610.

The spelling of 18722522 in words is "eighteen million, seven hundred twenty-two thousand, five hundred twenty-two".