21604002023323 has 2 divisors, whose sum is σ = 21604002023324. Its totient is φ = 21604002023322.

The previous prime is 21604002023291. The next prime is 21604002023453. The reversal of 21604002023323 is 32332020040612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21604002023323 - 2⁵ = 21604002023291 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21604002023291 and 21604002023300.

It is not a weakly prime, because it can be changed into another prime (21604000023323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10802001011661 + 10802001011662.

It is an arithmetic number, because the mean of its divisors is an integer number (10802001011662).

Almost surely, 2^{21604002023323} is an apocalyptic number.

21604002023323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21604002023323 is an equidigital number, since it uses as much as digits as its factorization.

21604002023323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 21604002023323 its reverse (32332020040612), we get a palindrome (53936022063935).

The spelling of 21604002023323 in words is "twenty-one trillion, six hundred four billion, two million, twenty-three thousand, three hundred twenty-three".