21468238 has 16 divisors (see below), whose sum is σ = 35275824. Its totient is φ = 9717760.

The previous prime is 21468217. The next prime is 21468247. The reversal of 21468238 is 83286412.

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, 3756 + ... + 7552.

It is an arithmetic number, because the mean of its divisors is an integer number (2204739).

Almost surely, 2^21468238 is an apocalyptic number.

21468238 is a deficient number, since it is larger than the sum of its proper divisors (13807586).

21468238 is a wasteful number, since it uses less digits than its factorization.

21468238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4067.

The product of its digits is 18432, while the sum is 34.

The square root of 21468238 is about 4633.3829973357. The cubic root of 21468238 is about 277.9278922069.

The spelling of 21468238 in words is "twenty-one million, four hundred sixty-eight thousand, two hundred thirty-eight".