23640503423 has 2 divisors, whose sum is σ = 23640503424. Its totient is φ = 23640503422.

The previous prime is 23640503401. The next prime is 23640503459. The reversal of 23640503423 is 32430504632.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23640503423 - 2¹² = 23640499327 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23640503423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23640503023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11820251711 + 11820251712.

It is an arithmetic number, because the mean of its divisors is an integer number (11820251712).

Almost surely, 2^23640503423 is an apocalyptic number.

23640503423 is a deficient number, since it is larger than the sum of its proper divisors (1).

23640503423 is an equidigital number, since it uses as much as digits as its factorization.

23640503423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 32.

The spelling of 23640503423 in words is "twenty-three billion, six hundred forty million, five hundred three thousand, four hundred twenty-three".