21044332 has 12 divisors (see below), whose sum is σ = 37172520. Its totient is φ = 10423616.

The previous prime is 21044311. The next prime is 21044341. The reversal of 21044332 is 23344012.

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, 24157 + ... + 25012.

It is an arithmetic number, because the mean of its divisors is an integer number (3097710).

Almost surely, 2^21044332 is an apocalyptic number.

It is an amenable number.

21044332 is a deficient number, since it is larger than the sum of its proper divisors (16128188).

21044332 is a wasteful number, since it uses less digits than its factorization.

21044332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49280 (or 49278 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 21044332 is about 4587.4101626081. The cubic root of 21044332 is about 276.0864218618.

Adding to 21044332 its reverse (23344012), we get a palindrome (44388344).

The spelling of 21044332 in words is "twenty-one million, forty-four thousand, three hundred thirty-two".