18222829 has 2 divisors, whose sum is σ = 18222830. Its totient is φ = 18222828.

The previous prime is 18222811. The next prime is 18222859. The reversal of 18222829 is 92822281.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9162729 + 9060100 = 3027^2 + 3010^2 .

It is a cyclic number.

It is not a de Polignac number, because 18222829 - 2⁵ = 18222797 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18222794 and 18222803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18222859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9111414 + 9111415.

It is an arithmetic number, because the mean of its divisors is an integer number (9111415).

Almost surely, 2^18222829 is an apocalyptic number.

It is an amenable number.

18222829 is a deficient number, since it is larger than the sum of its proper divisors (1).

18222829 is an equidigital number, since it uses as much as digits as its factorization.

18222829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 34.

The square root of 18222829 is about 4268.8205631064. The cubic root of 18222829 is about 263.1511465715.

The spelling of 18222829 in words is "eighteen million, two hundred twenty-two thousand, eight hundred twenty-nine".