21223852 has 24 divisors (see below), whose sum is σ = 40660592. Its totient is φ = 9633600.

The previous prime is 21223849. The next prime is 21223883. The reversal of 21223852 is 25832212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174 + ... + 6517.

Almost surely, 2^21223852 is an apocalyptic number.

It is an amenable number.

21223852 is a deficient number, since it is larger than the sum of its proper divisors (19436740).

21223852 is a wasteful number, since it uses less digits than its factorization.

21223852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6769 (or 6767 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 21223852 is about 4606.9352068376. The cubic root of 21223852 is about 276.8692575926.

The spelling of 21223852 in words is "twenty-one million, two hundred twenty-three thousand, eight hundred fifty-two".