18676673 has 2 divisors, whose sum is σ = 18676674. Its totient is φ = 18676672.

The previous prime is 18676661. The next prime is 18676687. The reversal of 18676673 is 37667681.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9628609 + 9048064 = 3103^2 + 3008^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18676673 is a prime.

It is a super-2 number, since 2×18676673² = 697636228697858, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18676633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9338336 + 9338337.

It is an arithmetic number, because the mean of its divisors is an integer number (9338337).

Almost surely, 2^18676673 is an apocalyptic number.

It is an amenable number.

18676673 is a deficient number, since it is larger than the sum of its proper divisors (1).

18676673 is an equidigital number, since it uses as much as digits as its factorization.

18676673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 44.

The square root of 18676673 is about 4321.6516518572. The cubic root of 18676673 is about 265.3178717888.

The spelling of 18676673 in words is "eighteen million, six hundred seventy-six thousand, six hundred seventy-three".