21104852 has 12 divisors (see below), whose sum is σ = 37088436. Its totient is φ = 10508160.

The previous prime is 21104851. The next prime is 21104857. The reversal of 21104852 is 25840112.

It can be written as a sum of positive squares in 2 ways, for example, as 15888196 + 5216656 = 3986^2 + 2284^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21104851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9983 + ... + 11910.

It is an arithmetic number, because the mean of its divisors is an integer number (3090703).

Almost surely, 2^21104852 is an apocalyptic number.

It is an amenable number.

21104852 is a deficient number, since it is larger than the sum of its proper divisors (15983584).

21104852 is a wasteful number, since it uses less digits than its factorization.

21104852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22138 (or 22136 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 21104852 is about 4594.0017414015. The cubic root of 21104852 is about 276.3508281098.

Adding to 21104852 its reverse (25840112), we get a palindrome (46944964).

The spelling of 21104852 in words is "twenty-one million, one hundred four thousand, eight hundred fifty-two".