2001002003 has 32 divisors (see below), whose sum is σ = 2691988992. Its totient is φ = 1436428800.

The previous prime is 2001001997. The next prime is 2001002011. The reversal of 2001002003 is 3002001002.

It is a cyclic number.

It is not a de Polignac number, because 2001002003 - 2⁴ = 2001001987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001002903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 591908 + ... + 595278.

It is an arithmetic number, because the mean of its divisors is an integer number (84124656).

Almost surely, 2^2001002003 is an apocalyptic number.

2001002003 is a deficient number, since it is larger than the sum of its proper divisors (690986989).

2001002003 is a wasteful number, since it uses less digits than its factorization.

2001002003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3995.

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 2001002003 is about 44732.5608813088. The cubic root of 2001002003 is about 1260.1314222118.

Adding to 2001002003 its reverse (3002001002), we get a palindrome (5003003005).

The spelling of 2001002003 in words is "two billion, one million, two thousand, three".