40018543 has 2 divisors, whose sum is σ = 40018544. Its totient is φ = 40018542.

The previous prime is 40018519. The next prime is 40018567. The reversal of 40018543 is 34581004.

40018543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (40018519) and next prime (40018567).

It is a cyclic number.

It is not a de Polignac number, because 40018543 - 2⁹ = 40018031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40018513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20009271 + 20009272.

It is an arithmetic number, because the mean of its divisors is an integer number (20009272).

Almost surely, 2^40018543 is an apocalyptic number.

40018543 is a deficient number, since it is larger than the sum of its proper divisors (1).

40018543 is an equidigital number, since it uses as much as digits as its factorization.

40018543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 40018543 is about 6326.0211033477. The cubic root of 40018543 is about 342.0480279779.

Adding to 40018543 its reverse (34581004), we get a palindrome (74599547).

It can be divided in two parts, 4001 and 8543, that added together give a square (12544 = 112²).

The spelling of 40018543 in words is "forty million, eighteen thousand, five hundred forty-three".