21852928 has 18 divisors (see below), whose sum is σ = 43621004. Its totient is φ = 10926336.

The previous prime is 21852913. The next prime is 21852947. The reversal of 21852928 is 82925812.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42426 + ... + 42937.

Almost surely, 2^21852928 is an apocalyptic number.

It is an amenable number.

21852928 is a deficient number, since it is larger than the sum of its proper divisors (21768076).

21852928 is an frugal number, since it uses more digits than its factorization.

21852928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85379 (or 85365 counting only the distinct ones).

The product of its digits is 23040, while the sum is 37.

The square root of 21852928 is about 4674.7115419029. The cubic root of 21852928 is about 279.5781402378.

The spelling of 21852928 in words is "twenty-one million, eight hundred fifty-two thousand, nine hundred twenty-eight".