18530938463 has 2 divisors, whose sum is σ = 18530938464. Its totient is φ = 18530938462.

The previous prime is 18530938453. The next prime is 18530938627. The reversal of 18530938463 is 36483903581.

It is a weak prime.

It is an emirp because it is prime and its reverse (36483903581) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18530938463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18530938453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9265469231 + 9265469232.

It is an arithmetic number, because the mean of its divisors is an integer number (9265469232).

Almost surely, 2^18530938463 is an apocalyptic number.

18530938463 is a deficient number, since it is larger than the sum of its proper divisors (1).

18530938463 is an equidigital number, since it uses as much as digits as its factorization.

18530938463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 50.

The spelling of 18530938463 in words is "eighteen billion, five hundred thirty million, nine hundred thirty-eight thousand, four hundred sixty-three".