21024952 has 24 divisors (see below), whose sum is σ = 42690240. Its totient is φ = 9703200.

The previous prime is 21024911. The next prime is 21024953. The reversal of 21024952 is 25942012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21024953) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6424 + ... + 9127.

It is an arithmetic number, because the mean of its divisors is an integer number (1778760).

Almost surely, 2^21024952 is an apocalyptic number.

It is an amenable number.

21024952 is an abundant number, since it is smaller than the sum of its proper divisors (21665288).

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

21024952 is a wasteful number, since it uses less digits than its factorization.

21024952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15583 (or 15566 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 21024952 is about 4585.2973731264. The cubic root of 21024952 is about 276.0016453028.

Adding to 21024952 its reverse (25942012), we get a palindrome (46966964).

The spelling of 21024952 in words is "twenty-one million, twenty-four thousand, nine hundred fifty-two".