20104129 has 2 divisors, whose sum is σ = 20104130. Its totient is φ = 20104128.

The previous prime is 20104067. The next prime is 20104141. The reversal of 20104129 is 92140102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18905104 + 1199025 = 4348^2 + 1095^2 .

It is a cyclic number.

It is not a de Polignac number, because 20104129 - 2¹⁵ = 20071361 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20104159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10052064 + 10052065.

It is an arithmetic number, because the mean of its divisors is an integer number (10052065).

Almost surely, 2^20104129 is an apocalyptic number.

It is an amenable number.

20104129 is a deficient number, since it is larger than the sum of its proper divisors (1).

20104129 is an equidigital number, since it uses as much as digits as its factorization.

20104129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 20104129 is about 4483.7628170990. The cubic root of 20104129 is about 271.9120291133.

The spelling of 20104129 in words is "twenty million, one hundred four thousand, one hundred twenty-nine".