20756345106157 has 2 divisors, whose sum is σ = 20756345106158. Its totient is φ = 20756345106156.

The previous prime is 20756345106137. The next prime is 20756345106163. The reversal of 20756345106157 is 75160154365702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15303321506916 + 5453023599241 = 3911946^2 + 2335171^2 .

It is a cyclic number.

It is not a de Polignac number, because 20756345106157 - 2³⁹ = 20206589292269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20756345106137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10378172553078 + 10378172553079.

It is an arithmetic number, because the mean of its divisors is an integer number (10378172553079).

Almost surely, 2^{20756345106157} is an apocalyptic number.

It is an amenable number.

20756345106157 is a deficient number, since it is larger than the sum of its proper divisors (1).

20756345106157 is an equidigital number, since it uses as much as digits as its factorization.

20756345106157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292000, while the sum is 52.

The spelling of 20756345106157 in words is "twenty trillion, seven hundred fifty-six billion, three hundred forty-five million, one hundred six thousand, one hundred fifty-seven".