18494743 has 2 divisors, whose sum is σ = 18494744. Its totient is φ = 18494742.

The previous prime is 18494741. The next prime is 18494767. The reversal of 18494743 is 34749481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18494743 - 2¹ = 18494741 is a prime.

Together with 18494741, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 18494696 and 18494705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18494741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9247371 + 9247372.

It is an arithmetic number, because the mean of its divisors is an integer number (9247372).

Almost surely, 2^18494743 is an apocalyptic number.

18494743 is a deficient number, since it is larger than the sum of its proper divisors (1).

18494743 is an equidigital number, since it uses as much as digits as its factorization.

18494743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 40.

The square root of 18494743 is about 4300.5514762644. The cubic root of 18494743 is about 264.4535696556.

The spelling of 18494743 in words is "eighteen million, four hundred ninety-four thousand, seven hundred forty-three".