20541334129 has 2 divisors, whose sum is σ = 20541334130. Its totient is φ = 20541334128.

The previous prime is 20541334127. The next prime is 20541334183. The reversal of 20541334129 is 92143314502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20378133504 + 163200625 = 142752^2 + 12775^2 .

It is a cyclic number.

It is not a de Polignac number, because 20541334129 - 2¹ = 20541334127 is a prime.

Together with 20541334127, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20541334094 and 20541334103.

It is not a weakly prime, because it can be changed into another prime (20541334127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10270667064 + 10270667065.

It is an arithmetic number, because the mean of its divisors is an integer number (10270667065).

Almost surely, 2^20541334129 is an apocalyptic number.

It is an amenable number.

20541334129 is a deficient number, since it is larger than the sum of its proper divisors (1).

20541334129 is an equidigital number, since it uses as much as digits as its factorization.

20541334129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 20541334129 in words is "twenty billion, five hundred forty-one million, three hundred thirty-four thousand, one hundred twenty-nine".