18856078427 has 2 divisors, whose sum is σ = 18856078428. Its totient is φ = 18856078426.

The previous prime is 18856078421. The next prime is 18856078441. The reversal of 18856078427 is 72487065881.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18856078427 - 2¹⁸ = 18855816283 is a prime.

It is not a weakly prime, because it can be changed into another prime (18856078421) 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, 9428039213 + 9428039214.

It is an arithmetic number, because the mean of its divisors is an integer number (9428039214).

Almost surely, 2^18856078427 is an apocalyptic number.

18856078427 is a deficient number, since it is larger than the sum of its proper divisors (1).

18856078427 is an equidigital number, since it uses as much as digits as its factorization.

18856078427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6021120, while the sum is 56.

The spelling of 18856078427 in words is "eighteen billion, eight hundred fifty-six million, seventy-eight thousand, four hundred twenty-seven".