23003021 has 2 divisors, whose sum is σ = 23003022. Its totient is φ = 23003020.

The previous prime is 23002999. The next prime is 23003027. The reversal of 23003021 is 12030032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19802500 + 3200521 = 4450^2 + 1789^2 .

It is a cyclic number.

It is not a de Polignac number, because 23003021 - 2¹⁰ = 23001997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23002993 and 23003011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23003027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11501510 + 11501511.

It is an arithmetic number, because the mean of its divisors is an integer number (11501511).

Almost surely, 2^23003021 is an apocalyptic number.

It is an amenable number.

23003021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23003021 is an equidigital number, since it uses as much as digits as its factorization.

23003021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 23003021 is about 4796.1464739935. The cubic root of 23003021 is about 284.3991486316.

Adding to 23003021 its reverse (12030032), we get a palindrome (35033053).

The spelling of 23003021 in words is "twenty-three million, three thousand, twenty-one".