20524421513 has 2 divisors, whose sum is σ = 20524421514. Its totient is φ = 20524421512.

The previous prime is 20524421497. The next prime is 20524421543. The reversal of 20524421513 is 31512442502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16044528889 + 4479892624 = 126667^2 + 66932^2 .

It is a cyclic number.

It is not a de Polignac number, because 20524421513 - 2⁴ = 20524421497 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20524421543) 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, 10262210756 + 10262210757.

It is an arithmetic number, because the mean of its divisors is an integer number (10262210757).

Almost surely, 2^20524421513 is an apocalyptic number.

It is an amenable number.

20524421513 is a deficient number, since it is larger than the sum of its proper divisors (1).

20524421513 is an equidigital number, since it uses as much as digits as its factorization.

20524421513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 29.

The spelling of 20524421513 in words is "twenty billion, five hundred twenty-four million, four hundred twenty-one thousand, five hundred thirteen".