20168445029 has 2 divisors, whose sum is σ = 20168445030. Its totient is φ = 20168445028.

The previous prime is 20168444977. The next prime is 20168445061. The reversal of 20168445029 is 92054486102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20086542529 + 81902500 = 141727^2 + 9050^2 .

It is a cyclic number.

It is not a de Polignac number, because 20168445029 - 2¹² = 20168440933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20168445529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10084222514 + 10084222515.

It is an arithmetic number, because the mean of its divisors is an integer number (10084222515).

Almost surely, 2^20168445029 is an apocalyptic number.

It is an amenable number.

20168445029 is a deficient number, since it is larger than the sum of its proper divisors (1).

20168445029 is an equidigital number, since it uses as much as digits as its factorization.

20168445029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 20168445029 in words is "twenty billion, one hundred sixty-eight million, four hundred forty-five thousand, twenty-nine".