18864863503 has 2 divisors, whose sum is σ = 18864863504. Its totient is φ = 18864863502.

The previous prime is 18864863489. The next prime is 18864863519. The reversal of 18864863503 is 30536846881.

It is a weak prime.

It is an emirp because it is prime and its reverse (30536846881) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18864863503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18864863533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9432431751 + 9432431752.

It is an arithmetic number, because the mean of its divisors is an integer number (9432431752).

Almost surely, 2^18864863503 is an apocalyptic number.

18864863503 is a deficient number, since it is larger than the sum of its proper divisors (1).

18864863503 is an equidigital number, since it uses as much as digits as its factorization.

18864863503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3317760, while the sum is 52.

The spelling of 18864863503 in words is "eighteen billion, eight hundred sixty-four million, eight hundred sixty-three thousand, five hundred three".