18042859 has 2 divisors, whose sum is σ = 18042860. Its totient is φ = 18042858.

The previous prime is 18042841. The next prime is 18042887. The reversal of 18042859 is 95824081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18042859 - 2¹⁷ = 17911787 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18042809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9021429 + 9021430.

It is an arithmetic number, because the mean of its divisors is an integer number (9021430).

Almost surely, 2^18042859 is an apocalyptic number.

18042859 is a deficient number, since it is larger than the sum of its proper divisors (1).

18042859 is an equidigital number, since it uses as much as digits as its factorization.

18042859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 18042859 is about 4247.6886656157. The cubic root of 18042859 is about 262.2819789108.

The spelling of 18042859 in words is "eighteen million, forty-two thousand, eight hundred fifty-nine".