18716743 has 2 divisors, whose sum is σ = 18716744. Its totient is φ = 18716742.

The previous prime is 18716713. The next prime is 18716821. The reversal of 18716743 is 34761781.

It is a weak prime.

It is an emirp because it is prime and its reverse (34761781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18716743 - 2⁹ = 18716231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18716713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9358371 + 9358372.

It is an arithmetic number, because the mean of its divisors is an integer number (9358372).

Almost surely, 2^18716743 is an apocalyptic number.

18716743 is a deficient number, since it is larger than the sum of its proper divisors (1).

18716743 is an equidigital number, since it uses as much as digits as its factorization.

18716743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 37.

The square root of 18716743 is about 4326.2851269883. The cubic root of 18716743 is about 265.5074789561.

The spelling of 18716743 in words is "eighteen million, seven hundred sixteen thousand, seven hundred forty-three".