21366322 has 8 divisors (see below), whose sum is σ = 32153472. Its totient is φ = 10648500.

The previous prime is 21366311. The next prime is 21366329. The reversal of 21366322 is 22366312.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (21366329) 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, 16554 + ... + 17797.

It is an arithmetic number, because the mean of its divisors is an integer number (4019184).

Almost surely, 2^21366322 is an apocalyptic number.

21366322 is a deficient number, since it is larger than the sum of its proper divisors (10787150).

21366322 is a wasteful number, since it uses less digits than its factorization.

21366322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34664.

The product of its digits is 2592, while the sum is 25.

The square root of 21366322 is about 4622.3719019568. The cubic root of 21366322 is about 277.4873927665.

The spelling of 21366322 in words is "twenty-one million, three hundred sixty-six thousand, three hundred twenty-two".