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24663 = 38221

24663 has 4 divisors (see below), whose sum is σ = 32888. Its totient is φ = 16440.

The previous prime is 24659. The next prime is 24671. The reversal of 24663 is 36642.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 24663 - 22 = 24659 is a prime.

It is a D-number.

It is a Duffinian number.

24663 is a lucky number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4108 + ... + 4113.

It is an arithmetic number, because the mean of its divisors is an integer number (8222).

224663 is an apocalyptic number.

24663 is a deficient number, since it is larger than the sum of its proper divisors (8225).

24663 is an equidigital number, since it uses as much as digits as its factorization.

24663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8224.

The product of its digits is 864, while the sum is 21.

The square root of 24663 is about 157.0445796581. The cubic root of 24663 is about 29.1081966967.

Subtracting from 24663 its sum of digits (21), we obtain a palindrome (24642).

The spelling of 24663 in words is "twenty-four thousand, six hundred sixty-three".

Divisors: 1 3 8221 24663