20113234289 has 2 divisors, whose sum is σ = 20113234290. Its totient is φ = 20113234288.

The previous prime is 20113234213. The next prime is 20113234291. The reversal of 20113234289 is 98243231102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18316915600 + 1796318689 = 135340^2 + 42383^2 .

It is a cyclic number.

It is not a de Polignac number, because 20113234289 - 2⁸ = 20113234033 is a prime.

Together with 20113234291, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20113234789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056617144 + 10056617145.

It is an arithmetic number, because the mean of its divisors is an integer number (10056617145).

Almost surely, 2^20113234289 is an apocalyptic number.

It is an amenable number.

20113234289 is a deficient number, since it is larger than the sum of its proper divisors (1).

20113234289 is an equidigital number, since it uses as much as digits as its factorization.

20113234289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 20113234289 in words is "twenty billion, one hundred thirteen million, two hundred thirty-four thousand, two hundred eighty-nine".