21322032 has 20 divisors (see below), whose sum is σ = 55082040. Its totient is φ = 7107328.

The previous prime is 21322031. The next prime is 21322043. The reversal of 21322032 is 23022312.

It is not an unprimeable number, because it can be changed into a prime (21322031) 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, 222057 + ... + 222152.

It is an arithmetic number, because the mean of its divisors is an integer number (2754102).

Almost surely, 2^21322032 is an apocalyptic number.

It is an amenable number.

21322032 is an abundant number, since it is smaller than the sum of its proper divisors (33760008).

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

21322032 is a wasteful number, since it uses less digits than its factorization.

21322032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444220 (or 444214 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 21322032 is about 4617.5785862289. The cubic root of 21322032 is about 277.2955266716.

Adding to 21322032 its reverse (23022312), we get a palindrome (44344344).

The spelling of 21322032 in words is "twenty-one million, three hundred twenty-two thousand, thirty-two".