21330133023 has 4 divisors (see below), whose sum is σ = 28440177368. Its totient is φ = 14220088680.

The previous prime is 21330133021. The next prime is 21330133057. The reversal of 21330133023 is 32033103312.

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

It is not a de Polignac number, because 21330133023 - 2¹ = 21330133021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330133021) 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, 3555022168 + ... + 3555022173.

It is an arithmetic number, because the mean of its divisors is an integer number (7110044342).

Almost surely, 2^21330133023 is an apocalyptic number.

21330133023 is a deficient number, since it is larger than the sum of its proper divisors (7110044345).

21330133023 is an equidigital number, since it uses as much as digits as its factorization.

21330133023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7110044344.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21330133023 its reverse (32033103312), we get a palindrome (53363236335).

The spelling of 21330133023 in words is "twenty-one billion, three hundred thirty million, one hundred thirty-three thousand, twenty-three".