20513170063 has 2 divisors, whose sum is σ = 20513170064. Its totient is φ = 20513170062.

The previous prime is 20513170033. The next prime is 20513170123. The reversal of 20513170063 is 36007131502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20513170063 - 2¹⁷ = 20513038991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20513170033) 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, 10256585031 + 10256585032.

It is an arithmetic number, because the mean of its divisors is an integer number (10256585032).

Almost surely, 2^20513170063 is an apocalyptic number.

20513170063 is a deficient number, since it is larger than the sum of its proper divisors (1).

20513170063 is an equidigital number, since it uses as much as digits as its factorization.

20513170063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 28.

The spelling of 20513170063 in words is "twenty billion, five hundred thirteen million, one hundred seventy thousand, sixty-three".