20563475711 has 4 divisors (see below), whose sum is σ = 20565617832. Its totient is φ = 20561333592.

The previous prime is 20563475663. The next prime is 20563475729. The reversal of 20563475711 is 11757436502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20563475711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20563475771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056596 + ... + 1075881.

It is an arithmetic number, because the mean of its divisors is an integer number (5141404458).

Almost surely, 2^20563475711 is an apocalyptic number.

20563475711 is a deficient number, since it is larger than the sum of its proper divisors (2142121).

20563475711 is an equidigital number, since it uses as much as digits as its factorization.

20563475711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142120.

The product of its (nonzero) digits is 176400, while the sum is 41.

The spelling of 20563475711 in words is "twenty billion, five hundred sixty-three million, four hundred seventy-five thousand, seven hundred eleven".