20563788001 has 2 divisors, whose sum is σ = 20563788002. Its totient is φ = 20563788000.

The previous prime is 20563787987. The next prime is 20563788017. The reversal of 20563788001 is 10088736502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12108801600 + 8454986401 = 110040^2 + 91951^2 .

It is a cyclic number.

It is not a de Polignac number, because 20563788001 - 2⁷ = 20563787873 is a prime.

It is not a weakly prime, because it can be changed into another prime (20563758001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10281894000 + 10281894001.

It is an arithmetic number, because the mean of its divisors is an integer number (10281894001).

Almost surely, 2^20563788001 is an apocalyptic number.

It is an amenable number.

20563788001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20563788001 is an equidigital number, since it uses as much as digits as its factorization.

20563788001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 20563788001 in words is "twenty billion, five hundred sixty-three million, seven hundred eighty-eight thousand, one".