20104517129 has 2 divisors, whose sum is σ = 20104517130. Its totient is φ = 20104517128.

The previous prime is 20104517107. The next prime is 20104517137. The reversal of 20104517129 is 92171540102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19807747600 + 296769529 = 140740^2 + 17227^2 .

It is a cyclic number.

It is not a de Polignac number, because 20104517129 - 2²⁴ = 20087739913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20104517095 and 20104517104.

It is not a weakly prime, because it can be changed into another prime (20104517149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10052258564 + 10052258565.

It is an arithmetic number, because the mean of its divisors is an integer number (10052258565).

Almost surely, 2^20104517129 is an apocalyptic number.

It is an amenable number.

20104517129 is a deficient number, since it is larger than the sum of its proper divisors (1).

20104517129 is an equidigital number, since it uses as much as digits as its factorization.

20104517129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 32.

The spelling of 20104517129 in words is "twenty billion, one hundred four million, five hundred seventeen thousand, one hundred twenty-nine".