19689443213 has 8 divisors (see below), whose sum is σ = 21482750016. Its totient is φ = 17896696000.

The previous prime is 19689443201. The next prime is 19689443219. The reversal of 19689443213 is 31234498691.

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 19689443213 - 2¹⁸ = 19689181069 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 (19689443219) 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, 64556 + ... + 208677.

It is an arithmetic number, because the mean of its divisors is an integer number (2685343752).

Almost surely, 2^19689443213 is an apocalyptic number.

It is an amenable number.

19689443213 is a deficient number, since it is larger than the sum of its proper divisors (1793306803).

19689443213 is a wasteful number, since it uses less digits than its factorization.

19689443213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279795.

The product of its digits is 1119744, while the sum is 50.

The spelling of 19689443213 in words is "nineteen billion, six hundred eighty-nine million, four hundred forty-three thousand, two hundred thirteen".