19203996673 has 4 divisors (see below), whose sum is σ = 20214733360. Its totient is φ = 18193259988.

The previous prime is 19203996667. The next prime is 19203996703. The reversal of 19203996673 is 37669930291.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19203996673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19203996473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505368315 + ... + 505368352.

It is an arithmetic number, because the mean of its divisors is an integer number (5053683340).

Almost surely, 2^19203996673 is an apocalyptic number.

It is an amenable number.

19203996673 is a deficient number, since it is larger than the sum of its proper divisors (1010736687).

19203996673 is a wasteful number, since it uses less digits than its factorization.

19203996673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010736686.

The product of its (nonzero) digits is 3306744, while the sum is 55.

The spelling of 19203996673 in words is "nineteen billion, two hundred three million, nine hundred ninety-six thousand, six hundred seventy-three".