20013123656159 has 2 divisors, whose sum is σ = 20013123656160. Its totient is φ = 20013123656158.

The previous prime is 20013123656087. The next prime is 20013123656177. The reversal of 20013123656159 is 95165632131002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20013123656159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20013123656959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006561828079 + 10006561828080.

It is an arithmetic number, because the mean of its divisors is an integer number (10006561828080).

Almost surely, 2^{20013123656159} is an apocalyptic number.

20013123656159 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013123656159 is an equidigital number, since it uses as much as digits as its factorization.

20013123656159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 44.

The spelling of 20013123656159 in words is "twenty trillion, thirteen billion, one hundred twenty-three million, six hundred fifty-six thousand, one hundred fifty-nine".