18000069000081 has 32 divisors (see below), whose sum is σ = 27463507384320. Its totient is φ = 10272694089216.

The previous prime is 18000068999993. The next prime is 18000069000083. The reversal of 18000069000081 is 18000096000081.

It is not a de Polignac number, because 18000069000081 - 2¹¹ = 18000068998033 is a prime.

It is a super-2 number, since 2×18000069000081² (a number of 27 digits) contains 22 as substring.

18000069000081 is a strobogrammatic number because it is the same when read upside-down.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18000069000083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 283581310 + ... + 283644776.

It is an arithmetic number, because the mean of its divisors is an integer number (858234605760).

Almost surely, 2^{18000069000081} is an apocalyptic number.

It is an amenable number.

18000069000081 is a deficient number, since it is larger than the sum of its proper divisors (9463438384239).

18000069000081 is a wasteful number, since it uses less digits than its factorization.

18000069000081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80413.

The product of its (nonzero) digits is 3456, while the sum is 33.

Subtracting 18000069000081 from its reverse (18000096000081), we obtain a cube (27000000 = 300³).

The spelling of 18000069000081 in words is "eighteen trillion, sixty-nine million, eighty-one", and thus it is an aban number and an uban number.