22222220989 has 2 divisors, whose sum is σ = 22222220990. Its totient is φ = 22222220988.

The previous prime is 22222220981. The next prime is 22222221019. The reversal of 22222220989 is 98902222222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16651837764 + 5570383225 = 129042^2 + 74635^2 .

It is a cyclic number.

It is not a de Polignac number, because 22222220989 - 2³ = 22222220981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22222220981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11111110494 + 11111110495.

It is an arithmetic number, because the mean of its divisors is an integer number (11111110495).

Almost surely, 2^22222220989 is an apocalyptic number.

It is an amenable number.

22222220989 is a deficient number, since it is larger than the sum of its proper divisors (1).

22222220989 is an equidigital number, since it uses as much as digits as its factorization.

22222220989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 22222220989 in words is "twenty-two billion, two hundred twenty-two million, two hundred twenty thousand, nine hundred eighty-nine".