19728273 has 16 divisors (see below), whose sum is σ = 27841536. Its totient is φ = 12400080.

The previous prime is 19728259. The next prime is 19728281. The reversal of 19728273 is 37282791.

It is not a de Polignac number, because 19728273 - 2⁶ = 19728209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19728223) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2886 + ... + 6912.

It is an arithmetic number, because the mean of its divisors is an integer number (1740096).

Almost surely, 2^19728273 is an apocalyptic number.

It is an amenable number.

19728273 is a deficient number, since it is larger than the sum of its proper divisors (8113263).

19728273 is a wasteful number, since it uses less digits than its factorization.

19728273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4124.

The product of its digits is 42336, while the sum is 39.

The square root of 19728273 is about 4441.6520575119. The cubic root of 19728273 is about 270.2068510900.

The spelling of 19728273 in words is "nineteen million, seven hundred twenty-eight thousand, two hundred seventy-three".