19999991002 has 8 divisors (see below), whose sum is σ = 30015000000. Its totient is φ = 9994991004.

The previous prime is 19999990999. The next prime is 19999991017. The reversal of 19999991002 is 20019999991.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2497252 + ... + 2505247.

It is an arithmetic number, because the mean of its divisors is an integer number (3751875000).

Almost surely, 2^19999991002 is an apocalyptic number.

19999991002 is a deficient number, since it is larger than the sum of its proper divisors (10015008998).

19999991002 is a wasteful number, since it uses less digits than its factorization.

19999991002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5004500.

The product of its (nonzero) digits is 1062882, while the sum is 58.

The spelling of 19999991002 in words is "nineteen billion, nine hundred ninety-nine million, nine hundred ninety-one thousand, two".