20541530563 has 2 divisors, whose sum is σ = 20541530564. Its totient is φ = 20541530562.

The previous prime is 20541530551. The next prime is 20541530573. The reversal of 20541530563 is 36503514502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20541530563 - 2²⁵ = 20507976131 is a prime.

It is not a weakly prime, because it can be changed into another prime (20541530543) 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, 10270765281 + 10270765282.

It is an arithmetic number, because the mean of its divisors is an integer number (10270765282).

Almost surely, 2^20541530563 is an apocalyptic number.

20541530563 is a deficient number, since it is larger than the sum of its proper divisors (1).

20541530563 is an equidigital number, since it uses as much as digits as its factorization.

20541530563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 34.

The spelling of 20541530563 in words is "twenty billion, five hundred forty-one million, five hundred thirty thousand, five hundred sixty-three".