20373 has 4 divisors (see below), whose sum is σ = 27168. Its totient is φ = 13580.

The previous prime is 20369. The next prime is 20389. The reversal of 20373 is 37302.

20373 is nontrivially palindromic in base 11.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20373 - 2² = 20369 is a prime.

It is a D-number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 20373.

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 in 3 ways as a sum of consecutive naturals, for example, 3393 + ... + 3398.

It is an arithmetic number, because the mean of its divisors is an integer number (6792).

2²⁰³⁷³ is an apocalyptic number.

It is an amenable number.

20373 is a deficient number, since it is larger than the sum of its proper divisors (6795).

20373 is an equidigital number, since it uses as much as digits as its factorization.

20373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6794.

The product of its (nonzero) digits is 126, while the sum is 15.

The square root of 20373 is about 142.7340183698. The cubic root of 20373 is about 27.3118841575.

Adding to 20373 its reverse (37302), we get a palindrome (57675).

It can be divided in two parts, 203 and 73, that added together give a triangular number (276 = T₂₃).

The spelling of 20373 in words is "twenty thousand, three hundred seventy-three", and thus it is an iban number.