18112173959996 has 18 divisors (see below), whose sum is σ = 33452332378920. Its totient is φ = 8579450822472.

The previous prime is 18112173959989. The next prime is 18112173960079. The reversal of 18112173959996 is 69995937121181.

It is a Smith number, since the sum of its digits (71) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6271526936 + ... + 6271529823.

It is an arithmetic number, because the mean of its divisors is an integer number (1858462909940).

Almost surely, 2^{18112173959996} is an apocalyptic number.

It is an amenable number.

18112173959996 is a deficient number, since it is larger than the sum of its proper divisors (15340158418924).

18112173959996 is a wasteful number, since it uses less digits than its factorization.

18112173959996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12543056801 (or 12543056780 counting only the distinct ones).

The product of its digits is 66134880, while the sum is 71.

The spelling of 18112173959996 in words is "eighteen trillion, one hundred twelve billion, one hundred seventy-three million, nine hundred fifty-nine thousand, nine hundred ninety-six".