23544 has 32 divisors (see below), whose sum is σ = 66000. Its totient is φ = 7776.

The previous prime is 23539. The next prime is 23549. The reversal of 23544 is 44532.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23539) and next prime (23549).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23549) 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, 162 + ... + 270.

2²³⁵⁴⁴ is an apocalyptic number.

23544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33000).

23544 is an abundant number, since it is smaller than the sum of its proper divisors (42456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23544 is a wasteful number, since it uses less digits than its factorization.

23544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 114 counting only the distinct ones).

The product of its digits is 480, while the sum is 18.

The square root of 23544 is about 153.4405422305. The cubic root of 23544 is about 28.6611370862.

The spelling of 23544 in words is "twenty-three thousand, five hundred forty-four".