18663976627 has 2 divisors, whose sum is σ = 18663976628. Its totient is φ = 18663976626.

The previous prime is 18663976619. The next prime is 18663976673. The reversal of 18663976627 is 72667936681.

It is a weak prime.

It is an emirp because it is prime and its reverse (72667936681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18663976627 - 2³ = 18663976619 is a prime.

It is not a weakly prime, because it can be changed into another prime (18663976927) 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, 9331988313 + 9331988314.

It is an arithmetic number, because the mean of its divisors is an integer number (9331988314).

Almost surely, 2^18663976627 is an apocalyptic number.

18663976627 is a deficient number, since it is larger than the sum of its proper divisors (1).

18663976627 is an equidigital number, since it uses as much as digits as its factorization.

18663976627 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27433728, while the sum is 61.

The spelling of 18663976627 in words is "eighteen billion, six hundred sixty-three million, nine hundred seventy-six thousand, six hundred twenty-seven".