18163685348 has 12 divisors (see below), whose sum is σ = 31841542572. Its totient is φ = 9066101760.

The previous prime is 18163685347. The next prime is 18163685381. The reversal of 18163685348 is 84358636181.

It can be written as a sum of positive squares in 2 ways, for example, as 10070523904 + 8093161444 = 100352^2 + 89962^2 .

It is a super-2 number, since 2×18163685348² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18163685348.

It is not an unprimeable number, because it can be changed into a prime (18163685347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3932633 + ... + 3937248.

It is an arithmetic number, because the mean of its divisors is an integer number (2653461881).

Almost surely, 2^18163685348 is an apocalyptic number.

It is an amenable number.

18163685348 is a deficient number, since it is larger than the sum of its proper divisors (13677857224).

18163685348 is a wasteful number, since it uses less digits than its factorization.

18163685348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7870462 (or 7870460 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 53.

The spelling of 18163685348 in words is "eighteen billion, one hundred sixty-three million, six hundred eighty-five thousand, three hundred forty-eight".