19623 has 8 divisors (see below), whose sum is σ = 27136. Its totient is φ = 12600.

The previous prime is 19609. The next prime is 19661. The reversal of 19623 is 32691.

19623 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19623 - 2⁶ = 19559 is a prime.

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 19623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13 + ... + 198.

It is an arithmetic number, because the mean of its divisors is an integer number (3392).

2¹⁹⁶²³ is an apocalyptic number.

19623 is a deficient number, since it is larger than the sum of its proper divisors (7513).

19623 is a wasteful number, since it uses less digits than its factorization.

19623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245.

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

The square root of 19623 is about 140.0821187732. The cubic root of 19623 is about 26.9725372338.

It can be divided in two parts, 1962 and 3, that multiplied together give a triangular number (5886 = T₁₀₈).

The spelling of 19623 in words is "nineteen thousand, six hundred twenty-three".