21600323 has 2 divisors, whose sum is σ = 21600324. Its totient is φ = 21600322.

The previous prime is 21600311. The next prime is 21600343. The reversal of 21600323 is 32300612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21600323 - 2¹² = 21596227 is a prime.

It is not a weakly prime, because it can be changed into another prime (21600343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10800161 + 10800162.

It is an arithmetic number, because the mean of its divisors is an integer number (10800162).

Almost surely, 2^21600323 is an apocalyptic number.

21600323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21600323 is an equidigital number, since it uses as much as digits as its factorization.

21600323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 21600323 is about 4647.6147645862. The cubic root of 21600323 is about 278.4967181887.

Adding to 21600323 its reverse (32300612), we get a palindrome (53900935).

The spelling of 21600323 in words is "twenty-one million, six hundred thousand, three hundred twenty-three".