21304421330323 has 16 divisors (see below), whose sum is σ = 22055219858880. Its totient is φ = 20554705898496.

The previous prime is 21304421330317. The next prime is 21304421330341. The reversal of 21304421330323 is 32303312440312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21304421330323 - 2³³ = 21295831395731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21304421330623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228328386 + ... + 228421672.

It is an arithmetic number, because the mean of its divisors is an integer number (1378451241180).

Almost surely, 2^{21304421330323} is an apocalyptic number.

21304421330323 is a deficient number, since it is larger than the sum of its proper divisors (750798528557).

21304421330323 is a wasteful number, since it uses less digits than its factorization.

21304421330323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99006.

The product of its (nonzero) digits is 31104, while the sum is 31.

Adding to 21304421330323 its reverse (32303312440312), we get a palindrome (53607733770635).

The spelling of 21304421330323 in words is "twenty-one trillion, three hundred four billion, four hundred twenty-one million, three hundred thirty thousand, three hundred twenty-three".