21254230 has 16 divisors (see below), whose sum is σ = 38885904. Its totient is φ = 8362080.

The previous prime is 21254227. The next prime is 21254249. The reversal of 21254230 is 3245212.

It is a junction number, because it is equal to n+sod(n) for n = 21254198 and 21254207.

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, 16812 + ... + 18031.

It is an arithmetic number, because the mean of its divisors is an integer number (2430369).

Almost surely, 2^21254230 is an apocalyptic number.

21254230 is a deficient number, since it is larger than the sum of its proper divisors (17631674).

21254230 is a wasteful number, since it uses less digits than its factorization.

21254230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34911.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 21254230 is about 4610.2310137346. The cubic root of 21254230 is about 277.0012902493.

Adding to 21254230 its reverse (3245212), we get a palindrome (24499442).

The spelling of 21254230 in words is "twenty-one million, two hundred fifty-four thousand, two hundred thirty".