19728033 has 16 divisors (see below), whose sum is σ = 29305920. Its totient is φ = 11721024.

The previous prime is 19728017. The next prime is 19728073. The reversal of 19728033 is 33082791.

It is not a de Polignac number, because 19728033 - 2⁴ = 19728017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19727985 and 19728003.

It is not an unprimeable number, because it can be changed into a prime (19728073) 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, 7591 + ... + 9852.

It is an arithmetic number, because the mean of its divisors is an integer number (1831620).

Almost surely, 2^19728033 is an apocalyptic number.

19728033 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19728033 is a deficient number, since it is larger than the sum of its proper divisors (9577887).

19728033 is a wasteful number, since it uses less digits than its factorization.

19728033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17488.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 19728033 is about 4441.6250404554. The cubic root of 19728033 is about 270.2057553714.

The spelling of 19728033 in words is "nineteen million, seven hundred twenty-eight thousand, thirty-three".