18822169 has 4 divisors (see below), whose sum is σ = 18863460. Its totient is φ = 18780880.

The previous prime is 18822163. The next prime is 18822173. The reversal of 18822169 is 96122881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14348944 + 4473225 = 3788^2 + 2115^2 .

It is a cyclic number.

It is not a de Polignac number, because 18822169 - 2³ = 18822161 is a prime.

It is a super-2 number, since 2×18822169² = 708548091729122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18822161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19954 + ... + 20875.

It is an arithmetic number, because the mean of its divisors is an integer number (4715865).

Almost surely, 2^18822169 is an apocalyptic number.

It is an amenable number.

18822169 is a deficient number, since it is larger than the sum of its proper divisors (41291).

18822169 is an equidigital number, since it uses as much as digits as its factorization.

18822169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41290.

The product of its digits is 13824, while the sum is 37.

The square root of 18822169 is about 4338.4523738310. The cubic root of 18822169 is about 266.0050548345.

The spelling of 18822169 in words is "eighteen million, eight hundred twenty-two thousand, one hundred sixty-nine".