22345678889 has 2 divisors, whose sum is σ = 22345678890. Its totient is φ = 22345678888.

The previous prime is 22345678867. The next prime is 22345678907. The reversal of 22345678889 is 98887654322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18561337600 + 3784341289 = 136240^2 + 61517^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22345678889 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (22345648889) 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, 11172839444 + 11172839445.

It is an arithmetic number, because the mean of its divisors is an integer number (11172839445).

Almost surely, 2^22345678889 is an apocalyptic number.

It is an amenable number.

22345678889 is a deficient number, since it is larger than the sum of its proper divisors (1).

22345678889 is an equidigital number, since it uses as much as digits as its factorization.

22345678889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46448640, while the sum is 62.

The spelling of 22345678889 in words is "twenty-two billion, three hundred forty-five million, six hundred seventy-eight thousand, eight hundred eighty-nine".