19349888009 has 2 divisors, whose sum is σ = 19349888010. Its totient is φ = 19349888008.

The previous prime is 19349887933. The next prime is 19349888029. The reversal of 19349888009 is 90088894391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11894083600 + 7455804409 = 109060^2 + 86347^2 .

It is an emirp because it is prime and its reverse (90088894391) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19349888009 is a prime.

It is not a weakly prime, because it can be changed into another prime (19349888029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9674944004 + 9674944005.

It is an arithmetic number, because the mean of its divisors is an integer number (9674944005).

Almost surely, 2^19349888009 is an apocalyptic number.

It is an amenable number.

19349888009 is a deficient number, since it is larger than the sum of its proper divisors (1).

19349888009 is an equidigital number, since it uses as much as digits as its factorization.

19349888009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4478976, while the sum is 59.

The spelling of 19349888009 in words is "nineteen billion, three hundred forty-nine million, eight hundred eighty-eight thousand, nine".