20632756577 has 2 divisors, whose sum is σ = 20632756578. Its totient is φ = 20632756576.

The previous prime is 20632756531. The next prime is 20632756591. The reversal of 20632756577 is 77565723602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20549509201 + 83247376 = 143351^2 + 9124^2 .

It is a cyclic number.

It is not a de Polignac number, because 20632756577 - 2³⁰ = 19559014753 is a prime.

It is not a weakly prime, because it can be changed into another prime (20632753577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10316378288 + 10316378289.

It is an arithmetic number, because the mean of its divisors is an integer number (10316378289).

Almost surely, 2^20632756577 is an apocalyptic number.

It is an amenable number.

20632756577 is a deficient number, since it is larger than the sum of its proper divisors (1).

20632756577 is an equidigital number, since it uses as much as digits as its factorization.

20632756577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3704400, while the sum is 50.

The spelling of 20632756577 in words is "twenty billion, six hundred thirty-two million, seven hundred fifty-six thousand, five hundred seventy-seven".