21230033323 has 4 divisors (see below), whose sum is σ = 21546899560. Its totient is φ = 20913167088.

The previous prime is 21230033303. The next prime is 21230033329. The reversal of 21230033323 is 32333003212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21230033323 - 2²⁹ = 20693162411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21230033294 and 21230033303.

It is not an unprimeable number, because it can be changed into a prime (21230033329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158433018 + ... + 158433151.

It is an arithmetic number, because the mean of its divisors is an integer number (5386724890).

Almost surely, 2^21230033323 is an apocalyptic number.

21230033323 is a deficient number, since it is larger than the sum of its proper divisors (316866237).

21230033323 is an equidigital number, since it uses as much as digits as its factorization.

21230033323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316866236.

The product of its (nonzero) digits is 1944, while the sum is 22.

Adding to 21230033323 its reverse (32333003212), we get a palindrome (53563036535).

The spelling of 21230033323 in words is "twenty-one billion, two hundred thirty million, thirty-three thousand, three hundred twenty-three".