21024230 has 16 divisors (see below), whose sum is σ = 37902384. Its totient is φ = 8396640.

The previous prime is 21024221. The next prime is 21024253. The reversal of 21024230 is 3242012.

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, 7640 + ... + 10020.

It is an arithmetic number, because the mean of its divisors is an integer number (2368899).

Almost surely, 2^21024230 is an apocalyptic number.

21024230 is a deficient number, since it is larger than the sum of its proper divisors (16878154).

21024230 is a wasteful number, since it uses less digits than its factorization.

21024230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3271.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 21024230 is about 4585.2186425513. The cubic root of 21024230 is about 275.9984859540.

Adding to 21024230 its reverse (3242012), we get a palindrome (24266242).

The spelling of 21024230 in words is "twenty-one million, twenty-four thousand, two hundred thirty".