19381838393 has 8 divisors (see below), whose sum is σ = 19455903840. Its totient is φ = 19307867040.

The previous prime is 19381838381. The next prime is 19381838407. The reversal of 19381838393 is 39383818391.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19381838393 - 2³² = 15086871097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19381838293) 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 7 ways as a sum of consecutive naturals, for example, 403946 + ... + 449372.

It is an arithmetic number, because the mean of its divisors is an integer number (2431987980).

Almost surely, 2^19381838393 is an apocalyptic number.

It is an amenable number.

19381838393 is a deficient number, since it is larger than the sum of its proper divisors (74065447).

19381838393 is a wasteful number, since it uses less digits than its factorization.

19381838393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47047.

The product of its digits is 3359232, while the sum is 56.

The spelling of 19381838393 in words is "nineteen billion, three hundred eighty-one million, eight hundred thirty-eight thousand, three hundred ninety-three".