20736743750117 has 2 divisors, whose sum is σ = 20736743750118. Its totient is φ = 20736743750116.

The previous prime is 20736743750111. The next prime is 20736743750153. The reversal of 20736743750117 is 71105734763702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18610889353156 + 2125854396961 = 4314034^2 + 1458031^2 .

It is a cyclic number.

It is not a de Polignac number, because 20736743750117 - 2⁸ = 20736743749861 is a prime.

It is a super-3 number, since 3×20736743750117³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20736743750111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10368371875058 + 10368371875059.

It is an arithmetic number, because the mean of its divisors is an integer number (10368371875059).

Almost surely, 2^{20736743750117} is an apocalyptic number.

It is an amenable number.

20736743750117 is a deficient number, since it is larger than the sum of its proper divisors (1).

20736743750117 is an equidigital number, since it uses as much as digits as its factorization.

20736743750117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5186160, while the sum is 53.

The spelling of 20736743750117 in words is "twenty trillion, seven hundred thirty-six billion, seven hundred forty-three million, seven hundred fifty thousand, one hundred seventeen".