18636064079 has 2 divisors, whose sum is σ = 18636064080. Its totient is φ = 18636064078.

The previous prime is 18636064009. The next prime is 18636064099. The reversal of 18636064079 is 97046063681.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18636064079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18636064009) 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, 9318032039 + 9318032040.

It is an arithmetic number, because the mean of its divisors is an integer number (9318032040).

Almost surely, 2^18636064079 is an apocalyptic number.

18636064079 is a deficient number, since it is larger than the sum of its proper divisors (1).

18636064079 is an equidigital number, since it uses as much as digits as its factorization.

18636064079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The spelling of 18636064079 in words is "eighteen billion, six hundred thirty-six million, sixty-four thousand, seventy-nine".