1999993999992 has 128 divisors (see below), whose sum is σ = 5090420160000. Its totient is φ = 654730560000.

The previous prime is 1999993999879. The next prime is 1999994000009. The reversal of 1999993999992 is 2999993999991.

It is a self number, because there is not a number n which added to its sum of digits gives 1999993999992.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 201994242 + ... + 202004142.

It is an arithmetic number, because the mean of its divisors is an integer number (39768907500).

Almost surely, 2^{1999993999992} is an apocalyptic number.

1999993999992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1999993999992 is an abundant number, since it is smaller than the sum of its proper divisors (3090426160008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1999993999992 is a wasteful number, since it uses less digits than its factorization.

1999993999992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10677 (or 10673 counting only the distinct ones).

The product of its digits is 20920706406, while the sum is 96.

Subtracting 1999993999992 from its reverse (2999993999991), we obtain a palindrome (999999999999).

The spelling of 1999993999992 in words is "one trillion, nine hundred ninety-nine billion, nine hundred ninety-three million, nine hundred ninety-nine thousand, nine hundred ninety-two".