20716395751 has 2 divisors, whose sum is σ = 20716395752. Its totient is φ = 20716395750.

The previous prime is 20716395643. The next prime is 20716395767. The reversal of 20716395751 is 15759361702.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20716395751 - 2⁹ = 20716395239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20716395851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10358197875 + 10358197876.

It is an arithmetic number, because the mean of its divisors is an integer number (10358197876).

Almost surely, 2^20716395751 is an apocalyptic number.

20716395751 is a deficient number, since it is larger than the sum of its proper divisors (1).

20716395751 is an equidigital number, since it uses as much as digits as its factorization.

20716395751 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 396900, while the sum is 46.

The spelling of 20716395751 in words is "twenty billion, seven hundred sixteen million, three hundred ninety-five thousand, seven hundred fifty-one".