20608326889 has 2 divisors, whose sum is σ = 20608326890. Its totient is φ = 20608326888.

The previous prime is 20608326881. The next prime is 20608326901. The reversal of 20608326889 is 98862380602.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16210382400 + 4397944489 = 127320^2 + 66317^2 .

It is a cyclic number.

It is not a de Polignac number, because 20608326889 - 2³ = 20608326881 is a prime.

It is not a weakly prime, because it can be changed into another prime (20608326881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10304163444 + 10304163445.

It is an arithmetic number, because the mean of its divisors is an integer number (10304163445).

Almost surely, 2^20608326889 is an apocalyptic number.

It is an amenable number.

20608326889 is a deficient number, since it is larger than the sum of its proper divisors (1).

20608326889 is an equidigital number, since it uses as much as digits as its factorization.

20608326889 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 52.

The spelling of 20608326889 in words is "twenty billion, six hundred eight million, three hundred twenty-six thousand, eight hundred eighty-nine".