1998812836912 has 20 divisors (see below), whose sum is σ = 3872799279000. Its totient is φ = 999380764928.

The previous prime is 1998812836901. The next prime is 1998812836931. The reversal of 1998812836912 is 2196382188991.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 952537 + ... + 2214712.

It is an arithmetic number, because the mean of its divisors is an integer number (193639963950).

Almost surely, 2^{1998812836912} is an apocalyptic number.

It is an amenable number.

1998812836912 is a deficient number, since it is larger than the sum of its proper divisors (1873986442088).

1998812836912 is a wasteful number, since it uses less digits than its factorization.

1998812836912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3206700 (or 3206694 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 67.

The spelling of 1998812836912 in words is "one trillion, nine hundred ninety-eight billion, eight hundred twelve million, eight hundred thirty-six thousand, nine hundred twelve".