20513174063 has 2 divisors, whose sum is σ = 20513174064. Its totient is φ = 20513174062.

The previous prime is 20513174057. The next prime is 20513174089. The reversal of 20513174063 is 36047131502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20513174063 - 2¹⁶ = 20513108527 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20513170063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10256587031 + 10256587032.

It is an arithmetic number, because the mean of its divisors is an integer number (10256587032).

Almost surely, 2^20513174063 is an apocalyptic number.

20513174063 is a deficient number, since it is larger than the sum of its proper divisors (1).

20513174063 is an equidigital number, since it uses as much as digits as its factorization.

20513174063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The spelling of 20513174063 in words is "twenty billion, five hundred thirteen million, one hundred seventy-four thousand, sixty-three".