21234230 has 8 divisors (see below), whose sum is σ = 38221632. Its totient is φ = 8493688.

The previous prime is 21234211. The next prime is 21234281. The reversal of 21234230 is 3243212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21234199 and 21234208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061702 + ... + 1061721.

It is an arithmetic number, because the mean of its divisors is an integer number (4777704).

Almost surely, 2^21234230 is an apocalyptic number.

21234230 is a deficient number, since it is larger than the sum of its proper divisors (16987402).

21234230 is a wasteful number, since it uses less digits than its factorization.

21234230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123430.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 21234230 is about 4608.0614145213. The cubic root of 21234230 is about 276.9143779121.

Adding to 21234230 its reverse (3243212), we get a palindrome (24477442).

The spelling of 21234230 in words is "twenty-one million, two hundred thirty-four thousand, two hundred thirty".