18506671 has 2 divisors, whose sum is σ = 18506672. Its totient is φ = 18506670.

The previous prime is 18506639. The next prime is 18506717. The reversal of 18506671 is 17660581.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18506671 - 2⁵ = 18506639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18506071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9253335 + 9253336.

It is an arithmetic number, because the mean of its divisors is an integer number (9253336).

Almost surely, 2^18506671 is an apocalyptic number.

18506671 is a deficient number, since it is larger than the sum of its proper divisors (1).

18506671 is an equidigital number, since it uses as much as digits as its factorization.

18506671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 18506671 is about 4301.9380516228. The cubic root of 18506671 is about 264.5104096684.

The spelling of 18506671 in words is "eighteen million, five hundred six thousand, six hundred seventy-one".