18086771 has 2 divisors, whose sum is σ = 18086772. Its totient is φ = 18086770.

The previous prime is 18086743. The next prime is 18086837. The reversal of 18086771 is 17768081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18086771 - 2⁶ = 18086707 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18086711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9043385 + 9043386.

It is an arithmetic number, because the mean of its divisors is an integer number (9043386).

Almost surely, 2^18086771 is an apocalyptic number.

18086771 is a deficient number, since it is larger than the sum of its proper divisors (1).

18086771 is an equidigital number, since it uses as much as digits as its factorization.

18086771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18816, while the sum is 38.

The square root of 18086771 is about 4252.8544531879. The cubic root of 18086771 is about 262.4945837129.

The spelling of 18086771 in words is "eighteen million, eighty-six thousand, seven hundred seventy-one".