16504 has 8 divisors (see below), whose sum is σ = 30960. Its totient is φ = 8248.

The previous prime is 16493. The next prime is 16519. The reversal of 16504 is 40561.

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

It is an Ulam number.

It is a plaindrome in base 9 and base 11.

It is a zygodrome in base 11.

It is a congruent number.

It is an unprimeable number.

16504 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 1024 + ... + 1039.

It is an arithmetic number, because the mean of its divisors is an integer number (3870).

2¹⁶⁵⁰⁴ is an apocalyptic number.

It is an amenable number.

16504 is a deficient number, since it is larger than the sum of its proper divisors (14456).

16504 is a wasteful number, since it uses less digits than its factorization.

16504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069 (or 2065 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 16504 is about 128.4678948220. The cubic root of 16504 is about 25.4602739117.

Subtracting from 16504 its product of nonzero digits (120), we obtain a 14-th power (16384 = 2¹⁴).

The spelling of 16504 in words is "sixteen thousand, five hundred four".