19042644329 has 2 divisors, whose sum is σ = 19042644330. Its totient is φ = 19042644328.

The previous prime is 19042644323. The next prime is 19042644347. The reversal of 19042644329 is 92344624091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15844515625 + 3198128704 = 125875^2 + 56552^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19042644329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19042644329.

It is not a weakly prime, because it can be changed into another prime (19042644323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9521322164 + 9521322165.

It is an arithmetic number, because the mean of its divisors is an integer number (9521322165).

Almost surely, 2^19042644329 is an apocalyptic number.

It is an amenable number.

19042644329 is a deficient number, since it is larger than the sum of its proper divisors (1).

19042644329 is an equidigital number, since it uses as much as digits as its factorization.

19042644329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 44.

The spelling of 19042644329 in words is "nineteen billion, forty-two million, six hundred forty-four thousand, three hundred twenty-nine".