21322332 has 48 divisors (see below), whose sum is σ = 58195200. Its totient is φ = 6732720.

The previous prime is 21322331. The next prime is 21322361. The reversal of 21322332 is 23322312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3144 + ... + 7247.

It is an arithmetic number, because the mean of its divisors is an integer number (1212400).

Almost surely, 2^21322332 is an apocalyptic number.

It is an amenable number.

21322332 is an abundant number, since it is smaller than the sum of its proper divisors (36872868).

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

21322332 is a wasteful number, since it uses less digits than its factorization.

21322332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10423 (or 10415 counting only the distinct ones).

The product of its digits is 432, while the sum is 18.

The square root of 21322332 is about 4617.6110706728. The cubic root of 21322332 is about 277.2968271773.

Adding to 21322332 its reverse (23322312), we get a palindrome (44644644).

The spelling of 21322332 in words is "twenty-one million, three hundred twenty-two thousand, three hundred thirty-two".