18474143 has 2 divisors, whose sum is σ = 18474144. Its totient is φ = 18474142.

The previous prime is 18474119. The next prime is 18474167. The reversal of 18474143 is 34147481.

It is a balanced prime because it is at equal distance from previous prime (18474119) and next prime (18474167).

It is an emirp because it is prime and its reverse (34147481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18474143 - 2⁸ = 18473887 is a prime.

It is a Sophie Germain 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 (18474173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9237071 + 9237072.

It is an arithmetic number, because the mean of its divisors is an integer number (9237072).

Almost surely, 2^18474143 is an apocalyptic number.

18474143 is a deficient number, since it is larger than the sum of its proper divisors (1).

18474143 is an equidigital number, since it uses as much as digits as its factorization.

18474143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 32.

The square root of 18474143 is about 4298.1557673030. The cubic root of 18474143 is about 264.3553477373.

The spelling of 18474143 in words is "eighteen million, four hundred seventy-four thousand, one hundred forty-three".