20247547306117 has 2 divisors, whose sum is σ = 20247547306118. Its totient is φ = 20247547306116.

The previous prime is 20247547306097. The next prime is 20247547306123. The reversal of 20247547306117 is 71160374574202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17697620577316 + 2549926728801 = 4206854^2 + 1596849^2 .

It is a cyclic number.

It is not a de Polignac number, because 20247547306117 - 2⁷ = 20247547305989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20247547306187) 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, 10123773653058 + 10123773653059.

It is an arithmetic number, because the mean of its divisors is an integer number (10123773653059).

Almost surely, 2^{20247547306117} is an apocalyptic number.

It is an amenable number.

20247547306117 is a deficient number, since it is larger than the sum of its proper divisors (1).

20247547306117 is an equidigital number, since it uses as much as digits as its factorization.

20247547306117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1975680, while the sum is 49.

The spelling of 20247547306117 in words is "twenty trillion, two hundred forty-seven billion, five hundred forty-seven million, three hundred six thousand, one hundred seventeen".