1999830195000 has 640 divisors, whose sum is σ = 7587271296000. Its totient is φ = 483874560000.

The previous prime is 1999830194959. The next prime is 1999830195001. The reversal of 1999830195000 is 5910389991.

1999830195000 is a `hidden beast` number, since 1 + 9 + 9 + 98 + 30 + 19 + 500 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999830195001) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1067714064 + ... + 1067715936.

It is an arithmetic number, because the mean of its divisors is an integer number (11855111400).

Almost surely, 2^{1999830195000} is an apocalyptic number.

1999830195000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1999830195000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3793635648000).

1999830195000 is an abundant number, since it is smaller than the sum of its proper divisors (5587441101000).

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

1999830195000 is a wasteful number, since it uses less digits than its factorization.

1999830195000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2638 (or 2613 counting only the distinct ones).

The product of its (nonzero) digits is 787320, while the sum is 54.

The spelling of 1999830195000 in words is "one trillion, nine hundred ninety-nine billion, eight hundred thirty million, one hundred ninety-five thousand".