18006720013 has 8 divisors (see below), whose sum is σ = 18466741440. Its totient is φ = 17547690720.

The previous prime is 18006720007. The next prime is 18006720023. The reversal of 18006720013 is 31002760081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18006720013 - 2²⁹ = 17469849101 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 (18006720023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211203 + ... + 283936.

It is an arithmetic number, because the mean of its divisors is an integer number (2308342680).

Almost surely, 2^18006720013 is an apocalyptic number.

It is an amenable number.

18006720013 is a deficient number, since it is larger than the sum of its proper divisors (460021427).

18006720013 is an equidigital number, since it uses as much as digits as its factorization.

18006720013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496067.

The product of its (nonzero) digits is 2016, while the sum is 28.

The spelling of 18006720013 in words is "eighteen billion, six million, seven hundred twenty thousand, thirteen".