20620309427563 has 2 divisors, whose sum is σ = 20620309427564. Its totient is φ = 20620309427562.

The previous prime is 20620309427561. The next prime is 20620309427617. The reversal of 20620309427563 is 36572490302602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20620309427563 - 2¹ = 20620309427561 is a prime.

Together with 20620309427561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20620309427561) 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 as a sum of consecutive naturals, namely, 10310154713781 + 10310154713782.

It is an arithmetic number, because the mean of its divisors is an integer number (10310154713782).

Almost surely, 2^{20620309427563} is an apocalyptic number.

20620309427563 is a deficient number, since it is larger than the sum of its proper divisors (1).

20620309427563 is an equidigital number, since it uses as much as digits as its factorization.

20620309427563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3265920, while the sum is 49.

The spelling of 20620309427563 in words is "twenty trillion, six hundred twenty billion, three hundred nine million, four hundred twenty-seven thousand, five hundred sixty-three".