23642513 has 2 divisors, whose sum is σ = 23642514. Its totient is φ = 23642512.

The previous prime is 23642477. The next prime is 23642537. The reversal of 23642513 is 31524632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23309584 + 332929 = 4828^2 + 577^2 .

It is a cyclic number.

It is not a de Polignac number, because 23642513 - 2⁶ = 23642449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (23642573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11821256 + 11821257.

It is an arithmetic number, because the mean of its divisors is an integer number (11821257).

Almost surely, 2^23642513 is an apocalyptic number.

It is an amenable number.

23642513 is a deficient number, since it is larger than the sum of its proper divisors (1).

23642513 is an equidigital number, since it uses as much as digits as its factorization.

23642513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 26.

The square root of 23642513 is about 4862.3567331079. The cubic root of 23642513 is about 287.0105618374.

The spelling of 23642513 in words is "twenty-three million, six hundred forty-two thousand, five hundred thirteen".