2001999950 has 12 divisors (see below), whose sum is σ = 3723720000. Its totient is φ = 800799960.

The previous prime is 2001999929. The next prime is 2001999953. The reversal of 2001999950 is 599991002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001999953) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20019950 + ... + 20020049.

It is an arithmetic number, because the mean of its divisors is an integer number (310310000).

Almost surely, 2^2001999950 is an apocalyptic number.

2001999950 is a deficient number, since it is larger than the sum of its proper divisors (1721720050).

2001999950 is a wasteful number, since it uses less digits than its factorization.

2001999950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40040011 (or 40040006 counting only the distinct ones).

The product of its (nonzero) digits is 65610, while the sum is 44.

The square root of 2001999950 is about 44743.7140836565. The cubic root of 2001999950 is about 1260.3408731723.

The spelling of 2001999950 in words is "two billion, one million, nine hundred ninety-nine thousand, nine hundred fifty".