23213444021 has 8 divisors (see below), whose sum is σ = 23359880544. Its totient is φ = 23067056880.

The previous prime is 23213444011. The next prime is 23213444041. The reversal of 23213444021 is 12044431232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23213444021 - 2¹⁰ = 23213442997 is a prime.

It is a super-2 number, since 2×23213444021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23213444011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1530686 + ... + 1545776.

It is an arithmetic number, because the mean of its divisors is an integer number (2919985068).

Almost surely, 2^23213444021 is an apocalyptic number.

It is an amenable number.

23213444021 is a deficient number, since it is larger than the sum of its proper divisors (146436523).

23213444021 is a wasteful number, since it uses less digits than its factorization.

23213444021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24691.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 23213444021 its reverse (12044431232), we get a palindrome (35257875253).

The spelling of 23213444021 in words is "twenty-three billion, two hundred thirteen million, four hundred forty-four thousand, twenty-one".