19923 has 8 divisors (see below), whose sum is σ = 27600. Its totient is φ = 12768.

The previous prime is 19919. The next prime is 19927. The reversal of 19923 is 32991.

It is a happy number.

19923 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is an interprime number because it is at equal distance from previous prime (19919) and next prime (19927).

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

It is not a de Polignac number, because 19923 - 2² = 19919 is a prime.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 19893 and 19902.

It is not an unprimeable number, because it can be changed into a prime (19927) 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, 28 + ... + 201.

It is an arithmetic number, because the mean of its divisors is an integer number (3450).

2¹⁹⁹²³ is an apocalyptic number.

19923 is a deficient number, since it is larger than the sum of its proper divisors (7677).

19923 is a wasteful number, since it uses less digits than its factorization.

19923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261.

The product of its digits is 486, while the sum is 24.

The square root of 19923 is about 141.1488575937. The cubic root of 19923 is about 27.1092963391.

It can be divided in two parts, 199 and 23, that added together give a palindrome (222).

The spelling of 19923 in words is "nineteen thousand, nine hundred twenty-three".