19203996671 has 32 divisors (see below), whose sum is σ = 21679902720. Its totient is φ = 16914737664.

The previous prime is 19203996667. The next prime is 19203996703. The reversal of 19203996671 is 17669930291.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 19203996671 - 2² = 19203996667 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 (19203996661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5142521 + ... + 5146253.

It is an arithmetic number, because the mean of its divisors is an integer number (677496960).

Almost surely, 2^19203996671 is an apocalyptic number.

19203996671 is a deficient number, since it is larger than the sum of its proper divisors (2475906049).

19203996671 is a wasteful number, since it uses less digits than its factorization.

19203996671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4055.

The product of its (nonzero) digits is 1102248, while the sum is 53.

The spelling of 19203996671 in words is "nineteen billion, two hundred three million, nine hundred ninety-six thousand, six hundred seventy-one".