20345022563 has 2 divisors, whose sum is σ = 20345022564. Its totient is φ = 20345022562.

The previous prime is 20345022557. The next prime is 20345022571. The reversal of 20345022563 is 36522054302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20345022563 - 2²⁶ = 20277913699 is a prime.

It is not a weakly prime, because it can be changed into another prime (20345022263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10172511281 + 10172511282.

It is an arithmetic number, because the mean of its divisors is an integer number (10172511282).

Almost surely, 2^20345022563 is an apocalyptic number.

20345022563 is a deficient number, since it is larger than the sum of its proper divisors (1).

20345022563 is an equidigital number, since it uses as much as digits as its factorization.

20345022563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 20345022563 its reverse (36522054302), we get a palindrome (56867076865).

The spelling of 20345022563 in words is "twenty billion, three hundred forty-five million, twenty-two thousand, five hundred sixty-three".