21042023330023 has 4 divisors (see below), whose sum is σ = 21246314818768. Its totient is φ = 20837731841280.

The previous prime is 21042023329993. The next prime is 21042023330137. The reversal of 21042023330023 is 32003332024012.

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 21042023330023 - 2⁹ = 21042023329511 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21042023330023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21042023330423) 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, 102145744218 + ... + 102145744423.

It is an arithmetic number, because the mean of its divisors is an integer number (5311578704692).

Almost surely, 2^{21042023330023} is an apocalyptic number.

21042023330023 is a deficient number, since it is larger than the sum of its proper divisors (204291488745).

21042023330023 is a wasteful number, since it uses less digits than its factorization.

21042023330023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204291488744.

The product of its (nonzero) digits is 5184, while the sum is 25.

Adding to 21042023330023 its reverse (32003332024012), we get a palindrome (53045355354035).

The spelling of 21042023330023 in words is "twenty-one trillion, forty-two billion, twenty-three million, three hundred thirty thousand, twenty-three".