18996671 has 2 divisors, whose sum is σ = 18996672. Its totient is φ = 18996670.

The previous prime is 18996647. The next prime is 18996683. The reversal of 18996671 is 17669981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18996671 - 2¹⁴ = 18980287 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18996641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9498335 + 9498336.

It is an arithmetic number, because the mean of its divisors is an integer number (9498336).

Almost surely, 2^18996671 is an apocalyptic number.

18996671 is a deficient number, since it is larger than the sum of its proper divisors (1).

18996671 is an equidigital number, since it uses as much as digits as its factorization.

18996671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 47.

The square root of 18996671 is about 4358.5170643236. The cubic root of 18996671 is about 266.8245795600.

The spelling of 18996671 in words is "eighteen million, nine hundred ninety-six thousand, six hundred seventy-one".