21412339 has 8 divisors (see below), whose sum is σ = 23451120. Its totient is φ = 19429536.

The previous prime is 21412337. The next prime is 21412357. The reversal of 21412339 is 93321412.

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

It is a cyclic number.

It is not a de Polignac number, because 21412339 - 2¹ = 21412337 is a prime.

It is a super-2 number, since 2×21412339² = 916976522901842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21412337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13192 + ... + 14725.

It is an arithmetic number, because the mean of its divisors is an integer number (2931390).

Almost surely, 2^21412339 is an apocalyptic number.

21412339 is a deficient number, since it is larger than the sum of its proper divisors (2038781).

21412339 is a wasteful number, since it uses less digits than its factorization.

21412339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27989.

The product of its digits is 1296, while the sum is 25.

The square root of 21412339 is about 4627.3468640248. The cubic root of 21412339 is about 277.6864596481.

The spelling of 21412339 in words is "twenty-one million, four hundred twelve thousand, three hundred thirty-nine".