2001311994 has 16 divisors (see below), whose sum is σ = 4366499040. Its totient is φ = 606458160.

The previous prime is 2001311993. The next prime is 2001312017. The reversal of 2001311994 is 4991131002.

It is not an unprimeable number, because it can be changed into a prime (2001311993) 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, 15161389 + ... + 15161520.

It is an arithmetic number, because the mean of its divisors is an integer number (272906190).

Almost surely, 2^2001311994 is an apocalyptic number.

2001311994 is an abundant number, since it is smaller than the sum of its proper divisors (2365187046).

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

2001311994 is a wasteful number, since it uses less digits than its factorization.

2001311994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30322925.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 2001311994 is about 44736.0256840055. The cubic root of 2001311994 is about 1260.1964911504.

Adding to 2001311994 its reverse (4991131002), we get a palindrome (6992442996).

The spelling of 2001311994 in words is "two billion, one million, three hundred eleven thousand, nine hundred ninety-four".