16508 has 6 divisors (see below), whose sum is σ = 28896. Its totient is φ = 8252.

The previous prime is 16493. The next prime is 16519. The reversal of 16508 is 80561.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 16508.

It is a congruent number.

It is an unprimeable number.

16508 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2060 + ... + 2067.

It is an arithmetic number, because the mean of its divisors is an integer number (4816).

2¹⁶⁵⁰⁸ is an apocalyptic number.

It is an amenable number.

16508 is a deficient number, since it is larger than the sum of its proper divisors (12388).

16508 is a wasteful number, since it uses less digits than its factorization.

16508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4131 (or 4129 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 16508 is about 128.4834619708. The cubic root of 16508 is about 25.4623306428.

It can be divided in two parts, 16 and 508, that multiplied together give a triangular number (8128 = T₁₂₇).

The spelling of 16508 in words is "sixteen thousand, five hundred eight".