19843393272 has 32 divisors (see below), whose sum is σ = 49624040400. Its totient is φ = 6612390144.

The previous prime is 19843393243. The next prime is 19843393307. The reversal of 19843393272 is 27239334891.

It is a congruent number.

It is an unprimeable number.

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, 50533 + ... + 205524.

Almost surely, 2^19843393272 is an apocalyptic number.

19843393272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19843393272 is an abundant number, since it is smaller than the sum of its proper divisors (29780647128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19843393272 is a wasteful number, since it uses less digits than its factorization.

19843393272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259295 (or 259291 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 51.

The spelling of 19843393272 in words is "nineteen billion, eight hundred forty-three million, three hundred ninety-three thousand, two hundred seventy-two".