21852204 has 48 divisors (see below), whose sum is σ = 58558080. Its totient is φ = 6272640.

The previous prime is 21852203. The next prime is 21852239. The reversal of 21852204 is 40225812.

It is not an unprimeable number, because it can be changed into a prime (21852203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1849 + ... + 6864.

It is an arithmetic number, because the mean of its divisors is an integer number (1219960).

Almost surely, 2^21852204 is an apocalyptic number.

It is an amenable number.

21852204 is an abundant number, since it is smaller than the sum of its proper divisors (36705876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21852204 is a wasteful number, since it uses less digits than its factorization.

21852204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8750 (or 8748 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 21852204 is about 4674.6341033283. The cubic root of 21852204 is about 279.5750526758.

The spelling of 21852204 in words is "twenty-one million, eight hundred fifty-two thousand, two hundred four".