20080945189 has 2 divisors, whose sum is σ = 20080945190. Its totient is φ = 20080945188.

The previous prime is 20080945187. The next prime is 20080945219. The reversal of 20080945189 is 98154908002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14123420964 + 5957524225 = 118842^2 + 77185^2 .

It is a cyclic number.

It is not a de Polignac number, because 20080945189 - 2¹ = 20080945187 is a prime.

Together with 20080945187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20080945187) 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, 10040472594 + 10040472595.

It is an arithmetic number, because the mean of its divisors is an integer number (10040472595).

Almost surely, 2^20080945189 is an apocalyptic number.

It is an amenable number.

20080945189 is a deficient number, since it is larger than the sum of its proper divisors (1).

20080945189 is an equidigital number, since it uses as much as digits as its factorization.

20080945189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 46.

The spelling of 20080945189 in words is "twenty billion, eighty million, nine hundred forty-five thousand, one hundred eighty-nine".