18128543 has 2 divisors, whose sum is σ = 18128544. Its totient is φ = 18128542.

The previous prime is 18128533. The next prime is 18128549. The reversal of 18128543 is 34582181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18128543 - 2⁶ = 18128479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18128549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9064271 + 9064272.

It is an arithmetic number, because the mean of its divisors is an integer number (9064272).

Almost surely, 2^18128543 is an apocalyptic number.

18128543 is a deficient number, since it is larger than the sum of its proper divisors (1).

18128543 is an equidigital number, since it uses as much as digits as its factorization.

18128543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 32.

The square root of 18128543 is about 4257.7626753966. The cubic root of 18128543 is about 262.6965083365.

The spelling of 18128543 in words is "eighteen million, one hundred twenty-eight thousand, five hundred forty-three".