18846643423 has 2 divisors, whose sum is σ = 18846643424. Its totient is φ = 18846643422.

The previous prime is 18846643397. The next prime is 18846643483. The reversal of 18846643423 is 32434664881.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18846643423 - 2¹³ = 18846635231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18846643483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9423321711 + 9423321712.

It is an arithmetic number, because the mean of its divisors is an integer number (9423321712).

Almost surely, 2^18846643423 is an apocalyptic number.

18846643423 is a deficient number, since it is larger than the sum of its proper divisors (1).

18846643423 is an equidigital number, since it uses as much as digits as its factorization.

18846643423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2654208, while the sum is 49.

The spelling of 18846643423 in words is "eighteen billion, eight hundred forty-six million, six hundred forty-three thousand, four hundred twenty-three".