1999517004 has 18 divisors (see below), whose sum is σ = 5054334740. Its totient is φ = 666505656.

The previous prime is 1999516949. The next prime is 1999517011. The reversal of 1999517004 is 4007159991.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 27771034 + ... + 27771105.

Almost surely, 2^1999517004 is an apocalyptic number.

It is an amenable number.

1999517004 is an abundant number, since it is smaller than the sum of its proper divisors (3054817736).

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

1999517004 is a wasteful number, since it uses less digits than its factorization.

1999517004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55542149 (or 55542144 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 45.

The square root of 1999517004 is about 44715.9591644862. The cubic root of 1999517004 is about 1259.8196189247.

The spelling of 1999517004 in words is "one billion, nine hundred ninety-nine million, five hundred seventeen thousand, four".