18968471 has 2 divisors, whose sum is σ = 18968472. Its totient is φ = 18968470.

The previous prime is 18968449. The next prime is 18968489. The reversal of 18968471 is 17486981.

It is a strong prime.

It is an emirp because it is prime and its reverse (17486981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18968471 - 2¹⁸ = 18706327 is a prime.

It is a super-3 number, since 3×18968471³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18968671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9484235 + 9484236.

It is an arithmetic number, because the mean of its divisors is an integer number (9484236).

Almost surely, 2^18968471 is an apocalyptic number.

18968471 is a deficient number, since it is larger than the sum of its proper divisors (1).

18968471 is an equidigital number, since it uses as much as digits as its factorization.

18968471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 44.

The square root of 18968471 is about 4355.2808175823. The cubic root of 18968471 is about 266.6924830909.

The spelling of 18968471 in words is "eighteen million, nine hundred sixty-eight thousand, four hundred seventy-one".