18676709 has 2 divisors, whose sum is σ = 18676710. Its totient is φ = 18676708.

The previous prime is 18676687. The next prime is 18676711. The reversal of 18676709 is 90767681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17455684 + 1221025 = 4178^2 + 1105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18676709 is a prime.

Together with 18676711, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18676709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18676769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9338354 + 9338355.

It is an arithmetic number, because the mean of its divisors is an integer number (9338355).

Almost surely, 2^18676709 is an apocalyptic number.

It is an amenable number.

18676709 is a deficient number, since it is larger than the sum of its proper divisors (1).

18676709 is an equidigital number, since it uses as much as digits as its factorization.

18676709 is an evil number, because the sum of its binary digits is even.

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

The square root of 18676709 is about 4321.6558169294. The cubic root of 18676709 is about 265.3180422588.

The spelling of 18676709 in words is "eighteen million, six hundred seventy-six thousand, seven hundred nine".