18006743 has 2 divisors, whose sum is σ = 18006744. Its totient is φ = 18006742.

The previous prime is 18006739. The next prime is 18006763. The reversal of 18006743 is 34760081.

It is a weak prime.

It is an emirp because it is prime and its reverse (34760081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18006743 - 2² = 18006739 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18006713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9003371 + 9003372.

It is an arithmetic number, because the mean of its divisors is an integer number (9003372).

Almost surely, 2^18006743 is an apocalyptic number.

18006743 is a deficient number, since it is larger than the sum of its proper divisors (1).

18006743 is an equidigital number, since it uses as much as digits as its factorization.

18006743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 18006743 is about 4243.4352828811. The cubic root of 18006743 is about 262.1068606302.

The spelling of 18006743 in words is "eighteen million, six thousand, seven hundred forty-three".