20043500129 has 2 divisors, whose sum is σ = 20043500130. Its totient is φ = 20043500128.

The previous prime is 20043500107. The next prime is 20043500143. The reversal of 20043500129 is 92100534002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17285149729 + 2758350400 = 131473^2 + 52520^2 .

It is a cyclic number.

It is not a de Polignac number, because 20043500129 - 2²⁰ = 20042451553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20043500098 and 20043500107.

It is not a weakly prime, because it can be changed into another prime (20043500179) 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, 10021750064 + 10021750065.

It is an arithmetic number, because the mean of its divisors is an integer number (10021750065).

Almost surely, 2^20043500129 is an apocalyptic number.

It is an amenable number.

20043500129 is a deficient number, since it is larger than the sum of its proper divisors (1).

20043500129 is an equidigital number, since it uses as much as digits as its factorization.

20043500129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The spelling of 20043500129 in words is "twenty billion, forty-three million, five hundred thousand, one hundred twenty-nine".