2000199981 has 8 divisors (see below), whose sum is σ = 2872082080. Its totient is φ = 1230892272.

The previous prime is 2000199979. The next prime is 2000200003. The reversal of 2000199981 is 1899910002.

It is a happy number.

2000199981 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2000199981 - 2¹ = 2000199979 is a prime.

It is a super-2 number, since 2×2000199981² = 8001599927984800722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 51287179 = 2000199981 / (2 + 0 + 0 + 0 + 1 + 9 + 9 + 9 + 8 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000199931) 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, 25643551 + ... + 25643628.

It is an arithmetic number, because the mean of its divisors is an integer number (359010260).

Almost surely, 2^2000199981 is an apocalyptic number.

It is an amenable number.

2000199981 is a deficient number, since it is larger than the sum of its proper divisors (871882099).

2000199981 is a wasteful number, since it uses less digits than its factorization.

2000199981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51287195.

The product of its (nonzero) digits is 11664, while the sum is 39.

The square root of 2000199981 is about 44723.5953496586. The cubic root of 2000199981 is about 1259.9630418739.

The spelling of 2000199981 in words is "two billion, one hundred ninety-nine thousand, nine hundred eighty-one".