16804 has 6 divisors (see below), whose sum is σ = 29414. Its totient is φ = 8400.

The previous prime is 16787. The next prime is 16811. The reversal of 16804 is 40861.

It can be written as a sum of positive squares in only one way, i.e., 10404 + 6400 = 102^2 + 80^2 .

It is a nialpdrome in base 7 and base 12.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2097 + ... + 2104.

2¹⁶⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

16804 is a deficient number, since it is larger than the sum of its proper divisors (12610).

16804 is a wasteful number, since it uses less digits than its factorization.

16804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4205 (or 4203 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 16804 is about 129.6302433848. The cubic root of 16804 is about 25.6136158038.

It can be divided in two parts, 16 and 804, that added together give a triangular number (820 = T₄₀).

The spelling of 16804 in words is "sixteen thousand, eight hundred four".