22021332 has 24 divisors (see below), whose sum is σ = 52579296. Its totient is φ = 7169568.

The previous prime is 22021331. The next prime is 22021357. The reversal of 22021332 is 23312022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20823 + ... + 21854.

It is an arithmetic number, because the mean of its divisors is an integer number (2190804).

Almost surely, 2^22021332 is an apocalyptic number.

It is an amenable number.

22021332 is an abundant number, since it is smaller than the sum of its proper divisors (30557964).

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

22021332 is a wasteful number, since it uses less digits than its factorization.

22021332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42727 (or 42725 counting only the distinct ones).

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

The square root of 22021332 is about 4692.6892076932. The cubic root of 22021332 is about 280.2944691171.

Adding to 22021332 its reverse (23312022), we get a palindrome (45333354).

The spelling of 22021332 in words is "twenty-two million, twenty-one thousand, three hundred thirty-two".