23648421 has 4 divisors (see below), whose sum is σ = 31531232. Its totient is φ = 15765612.

The previous prime is 23648399. The next prime is 23648447. The reversal of 23648421 is 12484632.

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 23648421 - 2¹⁵ = 23615653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23648461) 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, 3941401 + ... + 3941406.

It is an arithmetic number, because the mean of its divisors is an integer number (7882808).

Almost surely, 2^23648421 is an apocalyptic number.

It is an amenable number.

23648421 is a deficient number, since it is larger than the sum of its proper divisors (7882811).

23648421 is an equidigital number, since it uses as much as digits as its factorization.

23648421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7882810.

The product of its digits is 9216, while the sum is 30.

The square root of 23648421 is about 4862.9642194859. The cubic root of 23648421 is about 287.0344667578.

The spelling of 23648421 in words is "twenty-three million, six hundred forty-eight thousand, four hundred twenty-one".