18045687807 has 72 divisors (see below), whose sum is σ = 31500941472. Its totient is φ = 9917913600.

The previous prime is 18045687773. The next prime is 18045687809. The reversal of 18045687807 is 70878654081.

It is a happy number.

18045687807 is a `hidden beast` number, since 1 + 8 + 0 + 4 + 568 + 78 + 0 + 7 = 666.

It is not a de Polignac number, because 18045687807 - 2⁷ = 18045687679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18045687809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1276723 + ... + 1290779.

It is an arithmetic number, because the mean of its divisors is an integer number (437513076).

Almost surely, 2^18045687807 is an apocalyptic number.

18045687807 is a deficient number, since it is larger than the sum of its proper divisors (13455253665).

18045687807 is a wasteful number, since it uses less digits than its factorization.

18045687807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14189 (or 14179 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 54.

The spelling of 18045687807 in words is "eighteen billion, forty-five million, six hundred eighty-seven thousand, eight hundred seven".