18122 has 16 divisors (see below), whose sum is σ = 31752. Its totient is φ = 7680.

The previous prime is 18121. The next prime is 18127. The reversal of 18122 is 22181.

It can be written as a sum of positive squares in 4 ways, for example, as 10201 + 7921 = 101^2 + 89^2 .

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 18097 and 18106.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 18122.

It is not an unprimeable number, because it can be changed into a prime (18121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 422 + ... + 462.

2¹⁸¹²² is an apocalyptic number.

18122 is a deficient number, since it is larger than the sum of its proper divisors (13630).

18122 is a wasteful number, since it uses less digits than its factorization.

18122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73.

The product of its digits is 32, while the sum is 14.

The square root of 18122 is about 134.6179779970. The cubic root of 18122 is about 26.2664900169.

The spelling of 18122 in words is "eighteen thousand, one hundred twenty-two".