21385852 has 24 divisors (see below), whose sum is σ = 38665760. Its totient is φ = 10342080.

The previous prime is 21385843. The next prime is 21385867. The reversal of 21385852 is 25858312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33577 + ... + 34207.

Almost surely, 2^21385852 is an apocalyptic number.

It is an amenable number.

21385852 is a deficient number, since it is larger than the sum of its proper divisors (17279908).

21385852 is a wasteful number, since it uses less digits than its factorization.

21385852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901 (or 899 counting only the distinct ones).

The product of its digits is 19200, while the sum is 34.

The square root of 21385852 is about 4624.4839712124. The cubic root of 21385852 is about 277.5719132942.

The spelling of 21385852 in words is "twenty-one million, three hundred eighty-five thousand, eight hundred fifty-two".