18107143 has 2 divisors, whose sum is σ = 18107144. Its totient is φ = 18107142.

The previous prime is 18107119. The next prime is 18107149. The reversal of 18107143 is 34170181.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18107143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18107149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9053571 + 9053572.

It is an arithmetic number, because the mean of its divisors is an integer number (9053572).

Almost surely, 2^18107143 is an apocalyptic number.

18107143 is a deficient number, since it is larger than the sum of its proper divisors (1).

18107143 is an equidigital number, since it uses as much as digits as its factorization.

18107143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 18107143 is about 4255.2488763878. The cubic root of 18107143 is about 262.5931001587.

The spelling of 18107143 in words is "eighteen million, one hundred seven thousand, one hundred forty-three".