2000000019991 has 8 divisors (see below), whose sum is σ = 2005074961760. Its totient is φ = 1994925981312.

The previous prime is 2000000019977. The next prime is 2000000020001. The reversal of 2000000019991 is 1999100000002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2000000019991 - 2⁵ = 2000000019959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000000019091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4325206 + ... + 4765228.

It is an arithmetic number, because the mean of its divisors is an integer number (250634370220).

Almost surely, 2^{2000000019991} is an apocalyptic number.

2000000019991 is a deficient number, since it is larger than the sum of its proper divisors (5074941769).

2000000019991 is a wasteful number, since it uses less digits than its factorization.

2000000019991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451545.

The product of its (nonzero) digits is 1458, while the sum is 31.

Adding to 2000000019991 its reverse (1999100000002), we get a palindrome (3999100019993).

The spelling of 2000000019991 in words is "two trillion, nineteen thousand, nine hundred ninety-one".