23004021 has 4 divisors (see below), whose sum is σ = 30672032. Its totient is φ = 15336012.

The previous prime is 23004017. The next prime is 23004049. The reversal of 23004021 is 12040032.

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 not a de Polignac number, because 23004021 - 2² = 23004017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23003988 and 23004006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23004061) 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, 3834001 + ... + 3834006.

It is an arithmetic number, because the mean of its divisors is an integer number (7668008).

Almost surely, 2^23004021 is an apocalyptic number.

It is an amenable number.

23004021 is a deficient number, since it is larger than the sum of its proper divisors (7668011).

23004021 is an equidigital number, since it uses as much as digits as its factorization.

23004021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7668010.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 23004021 is about 4796.2507232212. The cubic root of 23004021 is about 284.4032697573.

Adding to 23004021 its reverse (12040032), we get a palindrome (35044053).

The spelling of 23004021 in words is "twenty-three million, four thousand, twenty-one".