18045184861 has 16 divisors (see below), whose sum is σ = 19754280000. Its totient is φ = 16347616000.

The previous prime is 18045184853. The next prime is 18045184891. The reversal of 18045184861 is 16848154081.

It is a cyclic number.

It is not a de Polignac number, because 18045184861 - 2³ = 18045184853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18045184891) 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 15 ways as a sum of consecutive naturals, for example, 8595990 + ... + 8598088.

It is an arithmetic number, because the mean of its divisors is an integer number (1234642500).

Almost surely, 2^18045184861 is an apocalyptic number.

18045184861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18045184861 is a deficient number, since it is larger than the sum of its proper divisors (1709095139).

18045184861 is a wasteful number, since it uses less digits than its factorization.

18045184861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4460.

The product of its (nonzero) digits is 245760, while the sum is 46.

The spelling of 18045184861 in words is "eighteen billion, forty-five million, one hundred eighty-four thousand, eight hundred sixty-one".