23853 has 4 divisors (see below), whose sum is σ = 31808. Its totient is φ = 15900.

The previous prime is 23833. The next prime is 23857. The reversal of 23853 is 35832.

Added to its reverse (35832) it gives a triangular number (59685 = T₃₄₅).

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 not a de Polignac number, because 23853 - 2⁶ = 23789 is a prime.

It is a d-powerful number, because it can be written as 2¹² + 3² + 8⁴ + 5⁶ + 3³ .

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23857) 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, 3973 + ... + 3978.

It is an arithmetic number, because the mean of its divisors is an integer number (7952).

2²³⁸⁵³ is an apocalyptic number.

It is an amenable number.

23853 is a deficient number, since it is larger than the sum of its proper divisors (7955).

23853 is an equidigital number, since it uses as much as digits as its factorization.

23853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7954.

The product of its digits is 720, while the sum is 21.

The square root of 23853 is about 154.4441646680. Note that the first 3 decimals coincide. The cubic root of 23853 is about 28.7859789003.

Subtracting from 23853 its sum of digits (21), we obtain a palindrome (23832).

Adding to 23853 its reverse (35832), we get a triangular number (59685 = T₃₄₅).

The spelling of 23853 in words is "twenty-three thousand, eight hundred fifty-three".