19444429859 has 2 divisors, whose sum is σ = 19444429860. Its totient is φ = 19444429858.

The previous prime is 19444429853. The next prime is 19444429871. The reversal of 19444429859 is 95892444491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19444429859 - 2⁴ = 19444429843 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 19444429798 and 19444429807.

It is not a weakly prime, because it can be changed into another prime (19444429853) 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, 9722214929 + 9722214930.

It is an arithmetic number, because the mean of its divisors is an integer number (9722214930).

Almost surely, 2^19444429859 is an apocalyptic number.

19444429859 is a deficient number, since it is larger than the sum of its proper divisors (1).

19444429859 is an equidigital number, since it uses as much as digits as its factorization.

19444429859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14929920, while the sum is 59.

The spelling of 19444429859 in words is "nineteen billion, four hundred forty-four million, four hundred twenty-nine thousand, eight hundred fifty-nine".