21338682 has 8 divisors (see below), whose sum is σ = 42677376. Its totient is φ = 7112892.

The previous prime is 21338671. The next prime is 21338683. The reversal of 21338682 is 28683312.

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

21338682 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21338683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1778218 + ... + 1778229.

It is an arithmetic number, because the mean of its divisors is an integer number (5334672).

Almost surely, 2^21338682 is an apocalyptic number.

21338682 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21338682 is a wasteful number, since it uses less digits than its factorization.

21338682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3556452.

The product of its digits is 13824, while the sum is 33.

The square root of 21338682 is about 4619.3811273806. The cubic root of 21338682 is about 277.3676862930.

The spelling of 21338682 in words is "twenty-one million, three hundred thirty-eight thousand, six hundred eighty-two".