18464396443 has 2 divisors, whose sum is σ = 18464396444. Its totient is φ = 18464396442.

The previous prime is 18464396429. The next prime is 18464396459. The reversal of 18464396443 is 34469346481.

It is a weak prime.

It is an emirp because it is prime and its reverse (34469346481) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18464396443 is a prime.

It is not a weakly prime, because it can be changed into another prime (18464396143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9232198221 + 9232198222.

It is an arithmetic number, because the mean of its divisors is an integer number (9232198222).

Almost surely, 2^18464396443 is an apocalyptic number.

18464396443 is a deficient number, since it is larger than the sum of its proper divisors (1).

18464396443 is an equidigital number, since it uses as much as digits as its factorization.

18464396443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5971968, while the sum is 52.

The spelling of 18464396443 in words is "eighteen billion, four hundred sixty-four million, three hundred ninety-six thousand, four hundred forty-three".