18822290689 has 2 divisors, whose sum is σ = 18822290690. Its totient is φ = 18822290688.

The previous prime is 18822290647. The next prime is 18822290699. The reversal of 18822290689 is 98609222881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11232396289 + 7589894400 = 105983^2 + 87120^2 .

It is a cyclic number.

It is not a de Polignac number, because 18822290689 - 2¹⁵ = 18822257921 is a prime.

It is not a weakly prime, because it can be changed into another prime (18822290699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9411145344 + 9411145345.

It is an arithmetic number, because the mean of its divisors is an integer number (9411145345).

Almost surely, 2^18822290689 is an apocalyptic number.

It is an amenable number.

18822290689 is a deficient number, since it is larger than the sum of its proper divisors (1).

18822290689 is an equidigital number, since it uses as much as digits as its factorization.

18822290689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1990656, while the sum is 55.

The spelling of 18822290689 in words is "eighteen billion, eight hundred twenty-two million, two hundred ninety thousand, six hundred eighty-nine".