18046718387 has 4 divisors (see below), whose sum is σ = 18103648416. Its totient is φ = 17989788360.

The previous prime is 18046718359. The next prime is 18046718399. The reversal of 18046718387 is 78381764081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18046718387 - 2¹² = 18046714291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18046718887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28464539 + ... + 28465172.

It is an arithmetic number, because the mean of its divisors is an integer number (4525912104).

Almost surely, 2^18046718387 is an apocalyptic number.

18046718387 is a deficient number, since it is larger than the sum of its proper divisors (56930029).

18046718387 is an equidigital number, since it uses as much as digits as its factorization.

18046718387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56930028.

The product of its (nonzero) digits is 1806336, while the sum is 53.

The spelling of 18046718387 in words is "eighteen billion, forty-six million, seven hundred eighteen thousand, three hundred eighty-seven".