20716395629 has 2 divisors, whose sum is σ = 20716395630. Its totient is φ = 20716395628.

The previous prime is 20716395559. The next prime is 20716395631. The reversal of 20716395629 is 92659361702.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11691015625 + 9025380004 = 108125^2 + 95002^2 .

It is a cyclic number.

It is not a de Polignac number, because 20716395629 - 2¹⁶ = 20716330093 is a prime.

Together with 20716395631, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20716395529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10358197814 + 10358197815.

It is an arithmetic number, because the mean of its divisors is an integer number (10358197815).

Almost surely, 2^20716395629 is an apocalyptic number.

It is an amenable number.

20716395629 is a deficient number, since it is larger than the sum of its proper divisors (1).

20716395629 is an equidigital number, since it uses as much as digits as its factorization.

20716395629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1224720, while the sum is 50.

The spelling of 20716395629 in words is "twenty billion, seven hundred sixteen million, three hundred ninety-five thousand, six hundred twenty-nine".