23845021 has 2 divisors, whose sum is σ = 23845022. Its totient is φ = 23845020.

The previous prime is 23845009. The next prime is 23845037. The reversal of 23845021 is 12054832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18619225 + 5225796 = 4315^2 + 2286^2 .

It is a cyclic number.

It is not a de Polignac number, because 23845021 - 2⁷ = 23844893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23845051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11922510 + 11922511.

It is an arithmetic number, because the mean of its divisors is an integer number (11922511).

Almost surely, 2^23845021 is an apocalyptic number.

It is an amenable number.

23845021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23845021 is an equidigital number, since it uses as much as digits as its factorization.

23845021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 23845021 is about 4883.1363896578. The cubic root of 23845021 is about 287.8276883674.

Adding to 23845021 its reverse (12054832), we get a palindrome (35899853).

The spelling of 23845021 in words is "twenty-three million, eight hundred forty-five thousand, twenty-one".