2011999972 has 24 divisors (see below), whose sum is σ = 3542507136. Its totient is φ = 999871008.

The previous prime is 2011999933. The next prime is 2011999991. The reversal of 2011999972 is 2799991102.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 664053 + ... + 667075.

It is an arithmetic number, because the mean of its divisors is an integer number (147604464).

Almost surely, 2^2011999972 is an apocalyptic number.

It is an amenable number.

2011999972 is a deficient number, since it is larger than the sum of its proper divisors (1530507164).

2011999972 is a wasteful number, since it uses less digits than its factorization.

2011999972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3987 (or 3985 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 49.

The square root of 2011999972 is about 44855.3226718970. The cubic root of 2011999972 is about 1262.4358631863.

The spelling of 2011999972 in words is "two billion, eleven million, nine hundred ninety-nine thousand, nine hundred seventy-two".