23020240021 has 4 divisors (see below), whose sum is σ = 23046311392. Its totient is φ = 22994168652.

The previous prime is 23020239961. The next prime is 23020240093. The reversal of 23020240021 is 12004202032.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23020240021 - 2¹¹ = 23020237973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23020239977 and 23020240004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23020240921) 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, 13034361 + ... + 13036126.

It is an arithmetic number, because the mean of its divisors is an integer number (5761577848).

Almost surely, 2^23020240021 is an apocalyptic number.

It is an amenable number.

23020240021 is a deficient number, since it is larger than the sum of its proper divisors (26071371).

23020240021 is an equidigital number, since it uses as much as digits as its factorization.

23020240021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26071370.

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 23020240021 its reverse (12004202032), we get a palindrome (35024442053).

The spelling of 23020240021 in words is "twenty-three billion, twenty million, two hundred forty thousand, twenty-one".