21330022 has 32 divisors (see below), whose sum is σ = 38257920. Its totient is φ = 8725920.

The previous prime is 21329999. The next prime is 21330047. The reversal of 21330022 is 22003312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21329984 and 21330011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43197 + ... + 43687.

It is an arithmetic number, because the mean of its divisors is an integer number (1195560).

Almost surely, 2^21330022 is an apocalyptic number.

21330022 is a deficient number, since it is larger than the sum of its proper divisors (16927898).

21330022 is a wasteful number, since it uses less digits than its factorization.

21330022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 21330022 is about 4618.4436772575. The cubic root of 21330022 is about 277.3301593084.

Adding to 21330022 its reverse (22003312), we get a palindrome (43333334).

The spelling of 21330022 in words is "twenty-one million, three hundred thirty thousand, twenty-two".