20524573697 has 2 divisors, whose sum is σ = 20524573698. Its totient is φ = 20524573696.

The previous prime is 20524573649. The next prime is 20524573753. The reversal of 20524573697 is 79637542502.

It is a Cunningham number, because it is equal to 143264²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20524573696 + 1 = 143264^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 20524573697 - 2⁶ = 20524573633 is a prime.

It is not a weakly prime, because it can be changed into another prime (20524573607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10262286848 + 10262286849.

It is an arithmetic number, because the mean of its divisors is an integer number (10262286849).

Almost surely, 2^20524573697 is an apocalyptic number.

It is an amenable number.

20524573697 is a deficient number, since it is larger than the sum of its proper divisors (1).

20524573697 is an equidigital number, since it uses as much as digits as its factorization.

20524573697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3175200, while the sum is 50.

The spelling of 20524573697 in words is "twenty billion, five hundred twenty-four million, five hundred seventy-three thousand, six hundred ninety-seven".