19799547924 has 24 divisors (see below), whose sum is σ = 49752710560. Its totient is φ = 6092168544.

The previous prime is 19799547871. The next prime is 19799547979. The reversal of 19799547924 is 42974599791.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63459934 + ... + 63460245.

Almost surely, 2^19799547924 is an apocalyptic number.

It is an amenable number.

19799547924 is an abundant number, since it is smaller than the sum of its proper divisors (29953162636).

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

19799547924 is a wasteful number, since it uses less digits than its factorization.

19799547924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126920199 (or 126920197 counting only the distinct ones).

The product of its digits is 51438240, while the sum is 66.

The spelling of 19799547924 in words is "nineteen billion, seven hundred ninety-nine million, five hundred forty-seven thousand, nine hundred twenty-four".