18485671 has 2 divisors, whose sum is σ = 18485672. Its totient is φ = 18485670.

The previous prime is 18485653. The next prime is 18485713. The reversal of 18485671 is 17658481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18485671 - 2¹¹ = 18483623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18485611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9242835 + 9242836.

It is an arithmetic number, because the mean of its divisors is an integer number (9242836).

Almost surely, 2^18485671 is an apocalyptic number.

18485671 is a deficient number, since it is larger than the sum of its proper divisors (1).

18485671 is an equidigital number, since it uses as much as digits as its factorization.

18485671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 40.

The square root of 18485671 is about 4299.4965984403. The cubic root of 18485671 is about 264.4103228591.

The spelling of 18485671 in words is "eighteen million, four hundred eighty-five thousand, six hundred seventy-one".