21326322 has 16 divisors (see below), whose sum is σ = 44897760. Its totient is φ = 6734592.

The previous prime is 21326309. The next prime is 21326351. The reversal of 21326322 is 22362312.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93423 + ... + 93650.

It is an arithmetic number, because the mean of its divisors is an integer number (2806110).

Almost surely, 2^21326322 is an apocalyptic number.

21326322 is an abundant number, since it is smaller than the sum of its proper divisors (23571438).

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

21326322 is a wasteful number, since it uses less digits than its factorization.

21326322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187097.

The product of its digits is 864, while the sum is 21.

The square root of 21326322 is about 4618.0430920467. The cubic root of 21326322 is about 277.3141227422.

Adding to 21326322 its reverse (22362312), we get a palindrome (43688634).

The spelling of 21326322 in words is "twenty-one million, three hundred twenty-six thousand, three hundred twenty-two".