16904 has 8 divisors (see below), whose sum is σ = 31710. Its totient is φ = 8448.

The previous prime is 16903. The next prime is 16921. The reversal of 16904 is 40961.

It can be written as a sum of positive squares in only one way, i.e., 16900 + 4 = 130^2 + 2^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (16901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1049 + ... + 1064.

It is an amenable number.

16904 is a deficient number, since it is larger than the sum of its proper divisors (14806).

16904 is a wasteful number, since it uses less digits than its factorization.

16904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2119 (or 2115 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 16904 is about 130.0153837052. The cubic root of 16904 is about 25.6643239180.

The spelling of 16904 in words is "sixteen thousand, nine hundred four".