18045851 has 2 divisors, whose sum is σ = 18045852. Its totient is φ = 18045850.

The previous prime is 18045827. The next prime is 18045889. The reversal of 18045851 is 15854081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18045851 - 2⁶ = 18045787 is a prime.

It is not a weakly prime, because it can be changed into another prime (18045451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9022925 + 9022926.

It is an arithmetic number, because the mean of its divisors is an integer number (9022926).

Almost surely, 2^18045851 is an apocalyptic number.

18045851 is a deficient number, since it is larger than the sum of its proper divisors (1).

18045851 is an equidigital number, since it uses as much as digits as its factorization.

18045851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6400, while the sum is 32.

The square root of 18045851 is about 4248.0408425532. The cubic root of 18045851 is about 262.2964759538.

The spelling of 18045851 in words is "eighteen million, forty-five thousand, eight hundred fifty-one".