21322338 has 8 divisors (see below), whose sum is σ = 42644688. Its totient is φ = 7107444.

The previous prime is 21322331. The next prime is 21322361. The reversal of 21322338 is 83322312.

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

21322338 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21322331) 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 3 ways as a sum of consecutive naturals, for example, 1776856 + ... + 1776867.

It is an arithmetic number, because the mean of its divisors is an integer number (5330586).

Almost surely, 2^21322338 is an apocalyptic number.

21322338 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.

21322338 is a wasteful number, since it uses less digits than its factorization.

21322338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553728.

The product of its digits is 1728, while the sum is 24.

The square root of 21322338 is about 4617.6117203593. The cubic root of 21322338 is about 277.2968531872.

The spelling of 21322338 in words is "twenty-one million, three hundred twenty-two thousand, three hundred thirty-eight".