21412234 has 8 divisors (see below), whose sum is σ = 32256900. Its totient is φ = 10659936.

The previous prime is 21412219. The next prime is 21412267. The reversal of 21412234 is 43221412.

It can be written as a sum of positive squares in 2 ways, for example, as 21390625 + 21609 = 4625^2 + 147^2 .

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

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, 22509 + ... + 23440.

Almost surely, 2^21412234 is an apocalyptic number.

21412234 is a deficient number, since it is larger than the sum of its proper divisors (10844666).

21412234 is a wasteful number, since it uses less digits than its factorization.

21412234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46184.

The product of its digits is 384, while the sum is 19.

The square root of 21412234 is about 4627.3355184166. The cubic root of 21412234 is about 277.6860057489.

Adding to 21412234 its reverse (43221412), we get a palindrome (64633646).

The spelling of 21412234 in words is "twenty-one million, four hundred twelve thousand, two hundred thirty-four".