16923 has 4 divisors (see below), whose sum is σ = 22568. Its totient is φ = 11280.

The previous prime is 16921. The next prime is 16927. The reversal of 16923 is 32961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32961 = 3 ⋅10987.

It is not a de Polignac number, because 16923 - 2¹ = 16921 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 16923.

It is not an unprimeable number, because it can be changed into a prime (16921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2818 + ... + 2823.

It is an arithmetic number, because the mean of its divisors is an integer number (5642).

2¹⁶⁹²³ is an apocalyptic number.

16923 is a deficient number, since it is larger than the sum of its proper divisors (5645).

16923 is an equidigital number, since it uses as much as digits as its factorization.

16923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5644.

The product of its digits is 324, while the sum is 21.

The square root of 16923 is about 130.0884314611. The cubic root of 16923 is about 25.6739358358.

It can be divided in two parts, 16 and 923, that added together give a palindrome (939).

The spelling of 16923 in words is "sixteen thousand, nine hundred twenty-three".