18706679 has 2 divisors, whose sum is σ = 18706680. Its totient is φ = 18706678.

The previous prime is 18706673. The next prime is 18706691. The reversal of 18706679 is 97660781.

It is a weak prime.

It is an emirp because it is prime and its reverse (97660781) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18706679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18706673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9353339 + 9353340.

It is an arithmetic number, because the mean of its divisors is an integer number (9353340).

Almost surely, 2^18706679 is an apocalyptic number.

18706679 is a deficient number, since it is larger than the sum of its proper divisors (1).

18706679 is an equidigital number, since it uses as much as digits as its factorization.

18706679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 18706679 is about 4325.1218479946. The cubic root of 18706679 is about 265.4598825992.

The spelling of 18706679 in words is "eighteen million, seven hundred six thousand, six hundred seventy-nine".