21322264 has 16 divisors (see below), whose sum is σ = 40429800. Its totient is φ = 10540992.

The previous prime is 21322241. The next prime is 21322277. The reversal of 21322264 is 46222312.

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, 14262 + ... + 15685.

Almost surely, 2^21322264 is an apocalyptic number.

It is an amenable number.

21322264 is a deficient number, since it is larger than the sum of its proper divisors (19107536).

21322264 is a wasteful number, since it uses less digits than its factorization.

21322264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30042 (or 30038 counting only the distinct ones).

The product of its digits is 1152, while the sum is 22.

The square root of 21322264 is about 4617.6037075522. The cubic root of 21322264 is about 277.2965323971.

Adding to 21322264 its reverse (46222312), we get a palindrome (67544576).

The spelling of 21322264 in words is "twenty-one million, three hundred twenty-two thousand, two hundred sixty-four".