18216144907 has 2 divisors, whose sum is σ = 18216144908. Its totient is φ = 18216144906.

The previous prime is 18216144889. The next prime is 18216144931. The reversal of 18216144907 is 70944161281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18216144907 - 2¹⁵ = 18216112139 is a prime.

It is not a weakly prime, because it can be changed into another prime (18216144007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9108072453 + 9108072454.

It is an arithmetic number, because the mean of its divisors is an integer number (9108072454).

Almost surely, 2^18216144907 is an apocalyptic number.

18216144907 is a deficient number, since it is larger than the sum of its proper divisors (1).

18216144907 is an equidigital number, since it uses as much as digits as its factorization.

18216144907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 18216144907 in words is "eighteen billion, two hundred sixteen million, one hundred forty-four thousand, nine hundred seven".