19728873 has 16 divisors (see below), whose sum is σ = 29909440. Its totient is φ = 12845952.

The previous prime is 19728853. The next prime is 19728883. The reversal of 19728873 is 37882791.

It is not a de Polignac number, because 19728873 - 2¹⁰ = 19727849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19728853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7336 + ... + 9657.

It is an arithmetic number, because the mean of its divisors is an integer number (1869340).

Almost surely, 2^19728873 is an apocalyptic number.

It is an amenable number.

19728873 is a deficient number, since it is larger than the sum of its proper divisors (10180567).

19728873 is a wasteful number, since it uses less digits than its factorization.

19728873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17045 (or 17039 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 19728873 is about 4441.7195994344. The cubic root of 19728873 is about 270.2095903476.

The spelling of 19728873 in words is "nineteen million, seven hundred twenty-eight thousand, eight hundred seventy-three".