39201680018 has 18 divisors (see below), whose sum is σ = 59192752437. Its totient is φ = 19471617240.

The previous prime is 39201679999. The next prime is 39201680027. The reversal of 39201680018 is 81008610293.

It can be written as a sum of positive squares in 2 ways, for example, as 25313764609 + 13887915409 = 159103^2 + 117847^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=140003.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 53480780 + ... + 53481512.

Almost surely, 2^39201680018 is an apocalyptic number.

39201680018 is a deficient number, since it is larger than the sum of its proper divisors (19991072419).

39201680018 is an frugal number, since it uses more digits than its factorization.

39201680018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850 (or 926 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The spelling of 39201680018 in words is "thirty-nine billion, two hundred one million, six hundred eighty thousand, eighteen".