18066713905 has 16 divisors (see below), whose sum is σ = 22279190544. Its totient is φ = 14054411520.

The previous prime is 18066713887. The next prime is 18066713933. The reversal of 18066713905 is 50931766081.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2333276416 + 15733437489 = 48304^2 + 125433^2 .

It is not a de Polignac number, because 18066713905 - 2¹¹ = 18066711857 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294039 + ... + 350131.

It is an arithmetic number, because the mean of its divisors is an integer number (1392449409).

Almost surely, 2^18066713905 is an apocalyptic number.

It is an amenable number.

18066713905 is a deficient number, since it is larger than the sum of its proper divisors (4212476639).

18066713905 is a wasteful number, since it uses less digits than its factorization.

18066713905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57876.

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 18066713905 in words is "eighteen billion, sixty-six million, seven hundred thirteen thousand, nine hundred five".