18678743 has 2 divisors, whose sum is σ = 18678744. Its totient is φ = 18678742.

The previous prime is 18678731. The next prime is 18678757. The reversal of 18678743 is 34787681.

It is a weak prime.

It is an emirp because it is prime and its reverse (34787681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18678743 - 2⁸ = 18678487 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18678694 and 18678703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18678713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9339371 + 9339372.

It is an arithmetic number, because the mean of its divisors is an integer number (9339372).

Almost surely, 2^18678743 is an apocalyptic number.

18678743 is a deficient number, since it is larger than the sum of its proper divisors (1).

18678743 is an equidigital number, since it uses as much as digits as its factorization.

18678743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 44.

The square root of 18678743 is about 4321.8911369908. The cubic root of 18678743 is about 265.3276734579.

The spelling of 18678743 in words is "eighteen million, six hundred seventy-eight thousand, seven hundred forty-three".