21332036765023 has 4 divisors (see below), whose sum is σ = 21352142361528. Its totient is φ = 21311931168520.

The previous prime is 21332036765021. The next prime is 21332036765063. The reversal of 21332036765023 is 32056763023312.

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 21332036765023 - 2¹ = 21332036765021 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 (21332036765021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10052796661 + ... + 10052798782.

It is an arithmetic number, because the mean of its divisors is an integer number (5338035590382).

Almost surely, 2^{21332036765023} is an apocalyptic number.

21332036765023 is a deficient number, since it is larger than the sum of its proper divisors (20105596505).

21332036765023 is a wasteful number, since it uses less digits than its factorization.

21332036765023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20105596504.

The product of its (nonzero) digits is 816480, while the sum is 43.

Adding to 21332036765023 its reverse (32056763023312), we get a palindrome (53388799788335).

The spelling of 21332036765023 in words is "twenty-one trillion, three hundred thirty-two billion, thirty-six million, seven hundred sixty-five thousand, twenty-three".