21332339 has 8 divisors (see below), whose sum is σ = 25440000. Its totient is φ = 17489736.

The previous prime is 21332329. The next prime is 21332347. The reversal of 21332339 is 93323312.

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 21332339 - 2²⁰ = 20283763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21332329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66089 + ... + 66410.

It is an arithmetic number, because the mean of its divisors is an integer number (3180000).

Almost surely, 2^21332339 is an apocalyptic number.

21332339 is a deficient number, since it is larger than the sum of its proper divisors (4107661).

21332339 is a wasteful number, since it uses less digits than its factorization.

21332339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132529.

The product of its digits is 2916, while the sum is 26.

The square root of 21332339 is about 4618.6945125219. The cubic root of 21332339 is about 277.3402007219.

The spelling of 21332339 in words is "twenty-one million, three hundred thirty-two thousand, three hundred thirty-nine".