21065332 has 24 divisors (see below), whose sum is σ = 38630592. Its totient is φ = 10032000.

The previous prime is 21065287. The next prime is 21065333. The reversal of 21065332 is 23356012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21065333) 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, 36607 + ... + 37177.

It is an arithmetic number, because the mean of its divisors is an integer number (1609608).

Almost surely, 2^21065332 is an apocalyptic number.

It is an amenable number.

21065332 is a deficient number, since it is larger than the sum of its proper divisors (17565260).

21065332 is a wasteful number, since it uses less digits than its factorization.

21065332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999 (or 997 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 21065332 is about 4589.6984650410. The cubic root of 21065332 is about 276.1782262709.

The spelling of 21065332 in words is "twenty-one million, sixty-five thousand, three hundred thirty-two".