20326 has 4 divisors (see below), whose sum is σ = 30492. Its totient is φ = 10162.

The previous prime is 20323. The next prime is 20327. The reversal of 20326 is 62302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62302 = 2 ⋅31151.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5080 + ... + 5083.

It is an arithmetic number, because the mean of its divisors is an integer number (7623).

2²⁰³²⁶ is an apocalyptic number.

20326 is a deficient number, since it is larger than the sum of its proper divisors (10166).

20326 is a wasteful number, since it uses less digits than its factorization.

20326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10165.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 20326 is about 142.5692814038. The cubic root of 20326 is about 27.2908653754.

Adding to 20326 its reverse (62302), we get a palindrome (82628).

The spelling of 20326 in words is "twenty thousand, three hundred twenty-six".