18000043500009 has 16 divisors (see below), whose sum is σ = 24414945258240. Its totient is φ = 11792720481360.

The previous prime is 18000043499989. The next prime is 18000043500059. The reversal of 18000043500009 is 90000534000081.

It is not a de Polignac number, because 18000043500009 - 2¹⁶ = 18000043434473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18000043500059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16354327 + ... + 17420220.

It is an arithmetic number, because the mean of its divisors is an integer number (1525934078640).

Almost surely, 2^{18000043500009} is an apocalyptic number.

It is an amenable number.

18000043500009 is a deficient number, since it is larger than the sum of its proper divisors (6414901758231).

18000043500009 is a wasteful number, since it uses less digits than its factorization.

18000043500009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33777620.

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 18000043500009 in words is "eighteen trillion, forty-three million, five hundred thousand, nine".