2001001994 has 8 divisors (see below), whose sum is σ = 3006618048. Its totient is φ = 998795980.

The previous prime is 2001001991. The next prime is 2001001997. The reversal of 2001001994 is 4991001002.

It is an interprime number because it is at equal distance from previous prime (2001001991) and next prime (2001001997).

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

It is not an unprimeable number, because it can be changed into a prime (2001001991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 851042 + ... + 853389.

It is an arithmetic number, because the mean of its divisors is an integer number (375827256).

Almost surely, 2^2001001994 is an apocalyptic number.

2001001994 is a deficient number, since it is larger than the sum of its proper divisors (1005616054).

2001001994 is a wasteful number, since it uses less digits than its factorization.

2001001994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1705020.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 2001001994 is about 44732.5607807110. The cubic root of 2001001994 is about 1260.1314203225.

Adding to 2001001994 its reverse (4991001002), we get a palindrome (6992002996).

The spelling of 2001001994 in words is "two billion, one million, one thousand, nine hundred ninety-four".