21024852 has 48 divisors (see below), whose sum is σ = 54214272. Its totient is φ = 6307840.

The previous prime is 21024833. The next prime is 21024853. The reversal of 21024852 is 25842012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21024853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2452 + ... + 6932.

It is an arithmetic number, because the mean of its divisors is an integer number (1129464).

Almost surely, 2^21024852 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21024852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27107136).

21024852 is an abundant number, since it is smaller than the sum of its proper divisors (33189420).

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

21024852 is a wasteful number, since it uses less digits than its factorization.

21024852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4528 (or 4526 counting only the distinct ones).

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

The square root of 21024852 is about 4585.2864686953. The cubic root of 21024852 is about 276.0012077242.

Adding to 21024852 its reverse (25842012), we get a palindrome (46866864).

The spelling of 21024852 in words is "twenty-one million, twenty-four thousand, eight hundred fifty-two".