20563090529 has 4 divisors (see below), whose sum is σ = 20794136580. Its totient is φ = 20332044480.

The previous prime is 20563090481. The next prime is 20563090547. The reversal of 20563090529 is 92509036502.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11761836304 + 8801254225 = 108452^2 + 93815^2 .

It is a cyclic number.

It is not a de Polignac number, because 20563090529 - 2²⁰ = 20562041953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20563095529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115522892 + ... + 115523069.

It is an arithmetic number, because the mean of its divisors is an integer number (5198534145).

Almost surely, 2^20563090529 is an apocalyptic number.

It is an amenable number.

20563090529 is a deficient number, since it is larger than the sum of its proper divisors (231046051).

20563090529 is an equidigital number, since it uses as much as digits as its factorization.

20563090529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231046050.

The product of its (nonzero) digits is 145800, while the sum is 41.

The spelling of 20563090529 in words is "twenty billion, five hundred sixty-three million, ninety thousand, five hundred twenty-nine".