18611361427 has 2 divisors, whose sum is σ = 18611361428. Its totient is φ = 18611361426.

The previous prime is 18611361413. The next prime is 18611361481. The reversal of 18611361427 is 72416311681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18611361427 - 2⁷ = 18611361299 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18611361427.

It is not a weakly prime, because it can be changed into another prime (18611361497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9305680713 + 9305680714.

It is an arithmetic number, because the mean of its divisors is an integer number (9305680714).

Almost surely, 2^18611361427 is an apocalyptic number.

18611361427 is a deficient number, since it is larger than the sum of its proper divisors (1).

18611361427 is an equidigital number, since it uses as much as digits as its factorization.

18611361427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The spelling of 18611361427 in words is "eighteen billion, six hundred eleven million, three hundred sixty-one thousand, four hundred twenty-seven".