21033030323 has 8 divisors (see below), whose sum is σ = 21604965360. Its totient is φ = 20461278240.

The previous prime is 21033030313. The next prime is 21033030331. The reversal of 21033030323 is 32303033012.

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

It is not a de Polignac number, because 21033030323 - 2⁴ = 21033030307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21033030295 and 21033030304.

It is not an unprimeable number, because it can be changed into a prime (21033030313) 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, 205868 + ... + 290598.

It is an arithmetic number, because the mean of its divisors is an integer number (2700620670).

Almost surely, 2^21033030323 is an apocalyptic number.

21033030323 is a deficient number, since it is larger than the sum of its proper divisors (571935037).

21033030323 is an equidigital number, since it uses as much as digits as its factorization.

21033030323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91477.

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

Adding to 21033030323 its reverse (32303033012), we get a palindrome (53336063335).

The spelling of 21033030323 in words is "twenty-one billion, thirty-three million, thirty thousand, three hundred twenty-three".