16818040843 has 2 divisors, whose sum is σ = 16818040844. Its totient is φ = 16818040842.

The previous prime is 16818040831. The next prime is 16818040867. The reversal of 16818040843 is 34804081861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16818040843 - 2²¹ = 16815943691 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16818040843.

It is not a weakly prime, because it can be changed into another prime (16818047843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8409020421 + 8409020422.

It is an arithmetic number, because the mean of its divisors is an integer number (8409020422).

Almost surely, 2^16818040843 is an apocalyptic number.

16818040843 is a deficient number, since it is larger than the sum of its proper divisors (1).

16818040843 is an equidigital number, since it uses as much as digits as its factorization.

16818040843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147456, while the sum is 43.

The spelling of 16818040843 in words is "sixteen billion, eight hundred eighteen million, forty thousand, eight hundred forty-three".