18043497873 has 40 divisors (see below), whose sum is σ = 27332448000. Its totient is φ = 11861059392.

The previous prime is 18043497863. The next prime is 18043497929. The reversal of 18043497873 is 37879434081.

18043497873 is a `hidden beast` number, since 1 + 80 + 4 + 3 + 497 + 8 + 73 = 666.

It is not a de Polignac number, because 18043497873 - 2¹⁷ = 18043366801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18043497803) 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 in 39 ways as a sum of consecutive naturals, for example, 1989453 + ... + 1998501.

It is an arithmetic number, because the mean of its divisors is an integer number (683311200).

Almost surely, 2^18043497873 is an apocalyptic number.

It is an amenable number.

18043497873 is a deficient number, since it is larger than the sum of its proper divisors (9288950127).

18043497873 is a wasteful number, since it uses less digits than its factorization.

18043497873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9403 (or 9394 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 18043497873 in words is "eighteen billion, forty-three million, four hundred ninety-seven thousand, eight hundred seventy-three".