21672322 has 16 divisors (see below), whose sum is σ = 37537920.
Its totient is φ = 9191808.
The previous prime is 21672319. The next prime is 21672323. The reversal of 21672322 is 22327612.
Adding to 21672322 its reverse (22327612), we get a palindrome (43999934).
It can be divided in two parts, 2167 and 2322, that added together give a square (4489 = 672).
It is not an unprimeable number, because it can be changed into a prime (21672323) 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, 6622 + ... + 9337.
It is an arithmetic number, because the mean of its divisors is an integer number (2346120).
Almost surely, 221672322 is an apocalyptic number.
21672322 is a deficient number, since it is larger than the sum of its proper divisors (15865598).
21672322 is a wasteful number, since it uses less digits than its factorization.
21672322 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 16065.
The product of its digits is 2016, while the sum is 25.
The square root of 21672322 is about 4655.3541218687.
The cubic root of 21672322 is about 278.8058068937.
The spelling of 21672322 in words is "twenty-one million, six hundred seventy-two thousand, three hundred twenty-two".