23421056 has 32 divisors (see below), whose sum is σ = 47372880. Its totient is φ = 11531520.

The previous prime is 23421049. The next prime is 23421059. The reversal of 23421056 is 65012432.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (23421059) 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, 7211 + ... + 9941.

Almost surely, 2^23421056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23421056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23686440).

23421056 is an abundant number, since it is smaller than the sum of its proper divisors (23951824).

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

23421056 is an equidigital number, since it uses as much as digits as its factorization.

23421056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2812 (or 2800 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 23421056 is about 4839.5305557461. The cubic root of 23421056 is about 286.1116163360. Note that the first 3 decimals are identical.

Adding to 23421056 its reverse (65012432), we get a palindrome (88433488).

The spelling of 23421056 in words is "twenty-three million, four hundred twenty-one thousand, fifty-six".