18042743 has 2 divisors, whose sum is σ = 18042744. Its totient is φ = 18042742.

The previous prime is 18042721. The next prime is 18042749. The reversal of 18042743 is 34724081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18042743 - 2⁸ = 18042487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18042749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9021371 + 9021372.

It is an arithmetic number, because the mean of its divisors is an integer number (9021372).

Almost surely, 2^18042743 is an apocalyptic number.

18042743 is a deficient number, since it is larger than the sum of its proper divisors (1).

18042743 is an equidigital number, since it uses as much as digits as its factorization.

18042743 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 18042743 is about 4247.6750111090. The cubic root of 18042743 is about 262.2814168274.

The spelling of 18042743 in words is "eighteen million, forty-two thousand, seven hundred forty-three".