18454543 has 2 divisors, whose sum is σ = 18454544. Its totient is φ = 18454542.

The previous prime is 18454519. The next prime is 18454603. The reversal of 18454543 is 34545481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18454543 - 2⁵ = 18454511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18454499 and 18454508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18454043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9227271 + 9227272.

It is an arithmetic number, because the mean of its divisors is an integer number (9227272).

Almost surely, 2^18454543 is an apocalyptic number.

18454543 is a deficient number, since it is larger than the sum of its proper divisors (1).

18454543 is an equidigital number, since it uses as much as digits as its factorization.

18454543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38400, while the sum is 34.

The square root of 18454543 is about 4295.8751145721. The cubic root of 18454543 is about 264.2618260645.

The spelling of 18454543 in words is "eighteen million, four hundred fifty-four thousand, five hundred forty-three".