18585939143 has 2 divisors, whose sum is σ = 18585939144. Its totient is φ = 18585939142.

The previous prime is 18585939109. The next prime is 18585939167. The reversal of 18585939143 is 34193958581.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18585939143 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18585939173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9292969571 + 9292969572.

It is an arithmetic number, because the mean of its divisors is an integer number (9292969572).

Almost surely, 2^18585939143 is an apocalyptic number.

18585939143 is a deficient number, since it is larger than the sum of its proper divisors (1).

18585939143 is an equidigital number, since it uses as much as digits as its factorization.

18585939143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4665600, while the sum is 56.

The spelling of 18585939143 in words is "eighteen billion, five hundred eighty-five million, nine hundred thirty-nine thousand, one hundred forty-three".