21230320323 has 8 divisors (see below), whose sum is σ = 28308590928. Its totient is φ = 14152798304.

The previous prime is 21230320313. The next prime is 21230320327. The reversal of 21230320323 is 32302303212.

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

It is a cyclic number.

It is not a de Polignac number, because 21230320323 - 2²¹ = 21228223171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21230320323.

It is not an unprimeable number, because it can be changed into a prime (21230320327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117240 + ... + 237077.

It is an arithmetic number, because the mean of its divisors is an integer number (3538573866).

Almost surely, 2^21230320323 is an apocalyptic number.

21230320323 is a deficient number, since it is larger than the sum of its proper divisors (7078270605).

21230320323 is a wasteful number, since it uses less digits than its factorization.

21230320323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374293.

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 21230320323 its reverse (32302303212), we get a palindrome (53532623535).

The spelling of 21230320323 in words is "twenty-one billion, two hundred thirty million, three hundred twenty thousand, three hundred twenty-three".