17999820112 has 40 divisors (see below), whose sum is σ = 35632540800. Its totient is φ = 8804497152.

The previous prime is 17999820101. The next prime is 17999820131. The reversal of 17999820112 is 21102899971.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2409439 + ... + 2416897.

It is an arithmetic number, because the mean of its divisors is an integer number (890813520).

Almost surely, 2^17999820112 is an apocalyptic number.

It is an amenable number.

17999820112 is a deficient number, since it is larger than the sum of its proper divisors (17632720688).

17999820112 is a wasteful number, since it uses less digits than its factorization.

17999820112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10723 (or 10717 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 49.

The spelling of 17999820112 in words is "seventeen billion, nine hundred ninety-nine million, eight hundred twenty thousand, one hundred twelve".