22123454189 has 2 divisors, whose sum is σ = 22123454190. Its totient is φ = 22123454188.

The previous prime is 22123454147. The next prime is 22123454191. The reversal of 22123454189 is 98145432122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22116746089 + 6708100 = 148717^2 + 2590^2 .

It is a cyclic number.

It is not a de Polignac number, because 22123454189 - 2¹² = 22123450093 is a prime.

Together with 22123454191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22123454789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11061727094 + 11061727095.

It is an arithmetic number, because the mean of its divisors is an integer number (11061727095).

Almost surely, 2^22123454189 is an apocalyptic number.

It is an amenable number.

22123454189 is a deficient number, since it is larger than the sum of its proper divisors (1).

22123454189 is an equidigital number, since it uses as much as digits as its factorization.

22123454189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 41.

The spelling of 22123454189 in words is "twenty-two billion, one hundred twenty-three million, four hundred fifty-four thousand, one hundred eighty-nine".