20194000889 has 2 divisors, whose sum is σ = 20194000890. Its totient is φ = 20194000888.

The previous prime is 20194000829. The next prime is 20194000891. The reversal of 20194000889 is 98800049102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18303925264 + 1890075625 = 135292^2 + 43475^2 .

It is a cyclic number.

It is not a de Polignac number, because 20194000889 - 2²⁰ = 20192952313 is a prime.

It is a Sophie Germain prime.

Together with 20194000891, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20194000819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10097000444 + 10097000445.

It is an arithmetic number, because the mean of its divisors is an integer number (10097000445).

Almost surely, 2^20194000889 is an apocalyptic number.

It is an amenable number.

20194000889 is a deficient number, since it is larger than the sum of its proper divisors (1).

20194000889 is an equidigital number, since it uses as much as digits as its factorization.

20194000889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 41.

The spelling of 20194000889 in words is "twenty billion, one hundred ninety-four million, eight hundred eighty-nine", and thus it is an aban number.