22493 has 4 divisors (see below), whose sum is σ = 22848. Its totient is φ = 22140.

The previous prime is 22483. The next prime is 22501. The reversal of 22493 is 39422.

22493 is nontrivially palindromic in base 8.

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 22493 - 2¹² = 18397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 11 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53 + ... + 218.

It is an arithmetic number, because the mean of its divisors is an integer number (5712).

2²²⁴⁹³ is an apocalyptic number.

It is an amenable number.

22493 is a deficient number, since it is larger than the sum of its proper divisors (355).

22493 is an equidigital number, since it uses as much as digits as its factorization.

22493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354.

The product of its digits is 432, while the sum is 20.

The square root of 22493 is about 149.9766648516. The cubic root of 22493 is about 28.2281528951.

It can be divided in two parts, 22 and 493, that added together give a palindrome (515).

The spelling of 22493 in words is "twenty-two thousand, four hundred ninety-three".