21024966 has 16 divisors (see below), whose sum is σ = 42303744. Its totient is φ = 6966024.

The previous prime is 21024961. The next prime is 21025019. The reversal of 21024966 is 66942012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21024961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9490 + ... + 11493.

It is an arithmetic number, because the mean of its divisors is an integer number (2643984).

Almost surely, 2^21024966 is an apocalyptic number.

21024966 is an abundant number, since it is smaller than the sum of its proper divisors (21278778).

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

21024966 is a wasteful number, since it uses less digits than its factorization.

21024966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21155.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 21024966 is about 4585.2988997447. The cubic root of 21024966 is about 276.0017065637.

Adding to 21024966 its reverse (66942012), we get a palindrome (87966978).

The spelling of 21024966 in words is "twenty-one million, twenty-four thousand, nine hundred sixty-six".