21033300323 has 6 divisors (see below), whose sum is σ = 24467308596. Its totient is φ = 18028543092.

The previous prime is 21033300263. The next prime is 21033300347. The reversal of 21033300323 is 32300333012.

It is not a de Polignac number, because 21033300323 - 2¹⁰ = 21033299299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21033300295 and 21033300304.

It is not an unprimeable number, because it can be changed into a prime (21033300373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 214625465 + ... + 214625562.

It is an arithmetic number, because the mean of its divisors is an integer number (4077884766).

Almost surely, 2^21033300323 is an apocalyptic number.

21033300323 is a deficient number, since it is larger than the sum of its proper divisors (3434008273).

21033300323 is an equidigital number, since it uses as much as digits as its factorization.

21033300323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429251041 (or 429251034 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 20.

Adding to 21033300323 its reverse (32300333012), we get a palindrome (53333633335).

The spelling of 21033300323 in words is "twenty-one billion, thirty-three million, three hundred thousand, three hundred twenty-three".