21033300023 has 4 divisors (see below), whose sum is σ = 21037201200. Its totient is φ = 21029398848.

The previous prime is 21033299971. The next prime is 21033300077. The reversal of 21033300023 is 32000333012.

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 21033300023 - 2¹⁶ = 21033234487 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21033299974 and 21033300010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033302023) 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 3 ways as a sum of consecutive naturals, for example, 1942490 + ... + 1953287.

It is an arithmetic number, because the mean of its divisors is an integer number (5259300300).

Almost surely, 2^21033300023 is an apocalyptic number.

21033300023 is a deficient number, since it is larger than the sum of its proper divisors (3901177).

21033300023 is an equidigital number, since it uses as much as digits as its factorization.

21033300023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3901176.

The product of its (nonzero) digits is 324, while the sum is 17.

Adding to 21033300023 its reverse (32000333012), we get a palindrome (53033633035).

The spelling of 21033300023 in words is "twenty-one billion, thirty-three million, three hundred thousand, twenty-three".