23640203 has 2 divisors, whose sum is σ = 23640204. Its totient is φ = 23640202.

The previous prime is 23640193. The next prime is 23640209. The reversal of 23640203 is 30204632.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23640203 - 2¹⁶ = 23574667 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (23640209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11820101 + 11820102.

It is an arithmetic number, because the mean of its divisors is an integer number (11820102).

Almost surely, 2^23640203 is an apocalyptic number.

23640203 is a deficient number, since it is larger than the sum of its proper divisors (1).

23640203 is an equidigital number, since it uses as much as digits as its factorization.

23640203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 23640203 is about 4862.1191881730. The cubic root of 23640203 is about 287.0012140438.

Adding to 23640203 its reverse (30204632), we get a palindrome (53844835).

The spelling of 23640203 in words is "twenty-three million, six hundred forty thousand, two hundred three".