19429850317 has 2 divisors, whose sum is σ = 19429850318. Its totient is φ = 19429850316.

The previous prime is 19429850311. The next prime is 19429850327. The reversal of 19429850317 is 71305892491.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17895483076 + 1534367241 = 133774^2 + 39171^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19429850317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19429850311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9714925158 + 9714925159.

It is an arithmetic number, because the mean of its divisors is an integer number (9714925159).

Almost surely, 2^19429850317 is an apocalyptic number.

It is an amenable number.

19429850317 is a deficient number, since it is larger than the sum of its proper divisors (1).

19429850317 is an equidigital number, since it uses as much as digits as its factorization.

19429850317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 19429850317 in words is "nineteen billion, four hundred twenty-nine million, eight hundred fifty thousand, three hundred seventeen".