18536143 has 2 divisors, whose sum is σ = 18536144. Its totient is φ = 18536142.

The previous prime is 18536113. The next prime is 18536159. The reversal of 18536143 is 34163581.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18536143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18536113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9268071 + 9268072.

It is an arithmetic number, because the mean of its divisors is an integer number (9268072).

Almost surely, 2^18536143 is an apocalyptic number.

18536143 is a deficient number, since it is larger than the sum of its proper divisors (1).

18536143 is an equidigital number, since it uses as much as digits as its factorization.

18536143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 18536143 is about 4305.3621218197. The cubic root of 18536143 is about 264.6507467437.

The spelling of 18536143 in words is "eighteen million, five hundred thirty-six thousand, one hundred forty-three".