18673679 has 2 divisors, whose sum is σ = 18673680. Its totient is φ = 18673678.

The previous prime is 18673673. The next prime is 18673693. The reversal of 18673679 is 97637681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18673679 - 2⁴ = 18673663 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18673673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9336839 + 9336840.

It is an arithmetic number, because the mean of its divisors is an integer number (9336840).

Almost surely, 2^18673679 is an apocalyptic number.

18673679 is a deficient number, since it is larger than the sum of its proper divisors (1).

18673679 is an equidigital number, since it uses as much as digits as its factorization.

18673679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 47.

The square root of 18673679 is about 4321.3052426321. The cubic root of 18673679 is about 265.3036936006.

The spelling of 18673679 in words is "eighteen million, six hundred seventy-three thousand, six hundred seventy-nine".