22220189 has 4 divisors (see below), whose sum is σ = 22229724. Its totient is φ = 22210656.

The previous prime is 22220171. The next prime is 22220203. The reversal of 22220189 is 98102222.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 18852964 + 3367225 = 4342^2 + 1835^2 .

It is a cyclic number.

It is not a de Polignac number, because 22220189 - 2⁸ = 22219933 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220489) 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 in 3 ways as a sum of consecutive naturals, for example, 1319 + ... + 6795.

It is an arithmetic number, because the mean of its divisors is an integer number (5557431).

Almost surely, 2^22220189 is an apocalyptic number.

It is an amenable number.

22220189 is a deficient number, since it is larger than the sum of its proper divisors (9535).

22220189 is an equidigital number, since it uses as much as digits as its factorization.

22220189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9534.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 22220189 is about 4713.8295471941. The cubic root of 22220189 is about 281.1356470755.

The spelling of 22220189 in words is "twenty-two million, two hundred twenty thousand, one hundred eighty-nine".