19468668391 has 16 divisors (see below), whose sum is σ = 20239220736. Its totient is φ = 18707400000.

The previous prime is 19468668367. The next prime is 19468668403. The reversal of 19468668391 is 19386686491.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19468668391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19468668491) 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 in 15 ways as a sum of consecutive naturals, for example, 3555786 + ... + 3561256.

It is an arithmetic number, because the mean of its divisors is an integer number (1264951296).

Almost surely, 2^19468668391 is an apocalyptic number.

19468668391 is a deficient number, since it is larger than the sum of its proper divisors (770552345).

19468668391 is a wasteful number, since it uses less digits than its factorization.

19468668391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6294.

The product of its digits is 13436928, while the sum is 61.

The spelling of 19468668391 in words is "nineteen billion, four hundred sixty-eight million, six hundred sixty-eight thousand, three hundred ninety-one".