20116717647457 has 2 divisors, whose sum is σ = 20116717647458. Its totient is φ = 20116717647456.

The previous prime is 20116717647427. The next prime is 20116717647541. The reversal of 20116717647457 is 75474671761102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20007585864256 + 109131783201 = 4472984^2 + 330351^2 .

It is a cyclic number.

It is not a de Polignac number, because 20116717647457 - 2⁷ = 20116717647329 is a prime.

It is not a weakly prime, because it can be changed into another prime (20116717647407) 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, 10058358823728 + 10058358823729.

It is an arithmetic number, because the mean of its divisors is an integer number (10058358823729).

Almost surely, 2^{20116717647457} is an apocalyptic number.

It is an amenable number.

20116717647457 is a deficient number, since it is larger than the sum of its proper divisors (1).

20116717647457 is an equidigital number, since it uses as much as digits as its factorization.

20116717647457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13829760, while the sum is 58.

The spelling of 20116717647457 in words is "twenty trillion, one hundred sixteen billion, seven hundred seventeen million, six hundred forty-seven thousand, four hundred fifty-seven".