20345022571 has 2 divisors, whose sum is σ = 20345022572. Its totient is φ = 20345022570.

The previous prime is 20345022563. The next prime is 20345022611. The reversal of 20345022571 is 17522054302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20345022571 - 2³ = 20345022563 is a prime.

It is not a weakly prime, because it can be changed into another prime (20345022371) 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, 10172511285 + 10172511286.

It is an arithmetic number, because the mean of its divisors is an integer number (10172511286).

Almost surely, 2^20345022571 is an apocalyptic number.

20345022571 is a deficient number, since it is larger than the sum of its proper divisors (1).

20345022571 is an equidigital number, since it uses as much as digits as its factorization.

20345022571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 31.

Adding to 20345022571 its reverse (17522054302), we get a palindrome (37867076873).

The spelling of 20345022571 in words is "twenty billion, three hundred forty-five million, twenty-two thousand, five hundred seventy-one".