23023333021 has 4 divisors (see below), whose sum is σ = 24794358652. Its totient is φ = 21252307392.

The previous prime is 23023333013. The next prime is 23023333043. The reversal of 23023333021 is 12033332032.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14943840025 + 8079492996 = 122245^2 + 89886^2 .

It is a cyclic number.

It is not a de Polignac number, because 23023333021 - 2³ = 23023333013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23023332983 and 23023333001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23023333621) 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, 885512796 + ... + 885512821.

It is an arithmetic number, because the mean of its divisors is an integer number (6198589663).

Almost surely, 2^23023333021 is an apocalyptic number.

It is an amenable number.

23023333021 is a deficient number, since it is larger than the sum of its proper divisors (1771025631).

23023333021 is a wasteful number, since it uses less digits than its factorization.

23023333021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771025630.

The product of its (nonzero) digits is 1944, while the sum is 22.

Adding to 23023333021 its reverse (12033332032), we get a palindrome (35056665053).

The spelling of 23023333021 in words is "twenty-three billion, twenty-three million, three hundred thirty-three thousand, twenty-one".