21322352 has 40 divisors (see below), whose sum is σ = 44055216. Its totient is φ = 9962496.

The previous prime is 21322331. The next prime is 21322361. The reversal of 21322352 is 25322312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75203 + ... + 75485.

Almost surely, 2^21322352 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 21322352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22027608).

21322352 is an abundant number, since it is smaller than the sum of its proper divisors (22732864).

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

21322352 is a wasteful number, since it uses less digits than its factorization.

21322352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585 (or 579 counting only the distinct ones).

The product of its digits is 720, while the sum is 20.

The square root of 21322352 is about 4617.6132362943. The cubic root of 21322352 is about 277.2969138772.

Adding to 21322352 its reverse (25322312), we get a palindrome (46644664).

The spelling of 21322352 in words is "twenty-one million, three hundred twenty-two thousand, three hundred fifty-two".