20525034135161 has 2 divisors, whose sum is σ = 20525034135162. Its totient is φ = 20525034135160.

The previous prime is 20525034135157. The next prime is 20525034135223. The reversal of 20525034135161 is 16153143052502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20520945300025 + 4088835136 = 4530005^2 + 63944^2 .

It is a cyclic number.

It is not a de Polignac number, because 20525034135161 - 2² = 20525034135157 is a prime.

It is not a weakly prime, because it can be changed into another prime (20525034135131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10262517067580 + 10262517067581.

It is an arithmetic number, because the mean of its divisors is an integer number (10262517067581).

Almost surely, 2^{20525034135161} is an apocalyptic number.

It is an amenable number.

20525034135161 is a deficient number, since it is larger than the sum of its proper divisors (1).

20525034135161 is an equidigital number, since it uses as much as digits as its factorization.

20525034135161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108000, while the sum is 38.

Adding to 20525034135161 its reverse (16153143052502), we get a palindrome (36678177187663).

The spelling of 20525034135161 in words is "twenty trillion, five hundred twenty-five billion, thirty-four million, one hundred thirty-five thousand, one hundred sixty-one".