21325323 has 8 divisors (see below), whose sum is σ = 28475200. Its totient is φ = 14196168.

The previous prime is 21325319. The next prime is 21325331. The reversal of 21325323 is 32352312.

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

It is not a de Polignac number, because 21325323 - 2² = 21325319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21325323.

It is not an unprimeable number, because it can be changed into a prime (21325313) 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 7 ways as a sum of consecutive naturals, for example, 2593 + ... + 7026.

It is an arithmetic number, because the mean of its divisors is an integer number (3559400).

Almost surely, 2^21325323 is an apocalyptic number.

21325323 is a deficient number, since it is larger than the sum of its proper divisors (7149877).

21325323 is an equidigital number, since it uses as much as digits as its factorization.

21325323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10361.

The product of its digits is 1080, while the sum is 21.

The square root of 21325323 is about 4617.9349280820. The cubic root of 21325323 is about 277.3097925513.

Adding to 21325323 its reverse (32352312), we get a palindrome (53677635).

The spelling of 21325323 in words is "twenty-one million, three hundred twenty-five thousand, three hundred twenty-three".