23864021 has 2 divisors, whose sum is σ = 23864022. Its totient is φ = 23864020.

The previous prime is 23863999. The next prime is 23864053. The reversal of 23864021 is 12046832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16240900 + 7623121 = 4030^2 + 2761^2 .

It is a cyclic number.

It is not a de Polignac number, because 23864021 - 2¹⁰ = 23862997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23864081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11932010 + 11932011.

It is an arithmetic number, because the mean of its divisors is an integer number (11932011).

Almost surely, 2^23864021 is an apocalyptic number.

It is an amenable number.

23864021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23864021 is an equidigital number, since it uses as much as digits as its factorization.

23864021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 23864021 is about 4885.0814732203. The cubic root of 23864021 is about 287.9041162613.

The spelling of 23864021 in words is "twenty-three million, eight hundred sixty-four thousand, twenty-one".