20441423129 has 2 divisors, whose sum is σ = 20441423130. Its totient is φ = 20441423128.

The previous prime is 20441423083. The next prime is 20441423143. The reversal of 20441423129 is 92132414402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20441278729 + 144400 = 142973^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 20441423129 - 2²⁸ = 20172987673 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20441423095 and 20441423104.

It is not a weakly prime, because it can be changed into another prime (20441423329) 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, 10220711564 + 10220711565.

It is an arithmetic number, because the mean of its divisors is an integer number (10220711565).

Almost surely, 2^20441423129 is an apocalyptic number.

It is an amenable number.

20441423129 is a deficient number, since it is larger than the sum of its proper divisors (1).

20441423129 is an equidigital number, since it uses as much as digits as its factorization.

20441423129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 20441423129 in words is "twenty billion, four hundred forty-one million, four hundred twenty-three thousand, one hundred twenty-nine".