21301330323 has 48 divisors (see below), whose sum is σ = 36183490560. Its totient is φ = 11045369664.

The previous prime is 21301330319. The next prime is 21301330333. The reversal of 21301330323 is 32303310312.

It is not a de Polignac number, because 21301330323 - 2² = 21301330319 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 21301330323.

It is not an unprimeable number, because it can be changed into a prime (21301330313) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18286 + ... + 207212.

It is an arithmetic number, because the mean of its divisors is an integer number (753822720).

Almost surely, 2^21301330323 is an apocalyptic number.

21301330323 is a deficient number, since it is larger than the sum of its proper divisors (14882160237).

21301330323 is a wasteful number, since it uses less digits than its factorization.

21301330323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189016 (or 189009 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21301330323 its reverse (32303310312), we get a palindrome (53604640635).

The spelling of 21301330323 in words is "twenty-one billion, three hundred one million, three hundred thirty thousand, three hundred twenty-three".