21325056 has 36 divisors (see below), whose sum is σ = 56757792. Its totient is φ = 7108096.

The previous prime is 21325037. The next prime is 21325093. The reversal of 21325056 is 65052312.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13116 + ... + 14651.

Almost surely, 2^21325056 is an apocalyptic number.

It is an amenable number.

21325056 is an abundant number, since it is smaller than the sum of its proper divisors (35432736).

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

21325056 is an equidigital number, since it uses as much as digits as its factorization.

21325056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27786 (or 27772 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 21325056 is about 4617.9060189657. The cubic root of 21325056 is about 277.3086352102.

Adding to 21325056 its reverse (65052312), we get a palindrome (86377368).

The spelling of 21325056 in words is "twenty-one million, three hundred twenty-five thousand, fifty-six".