19621491116 has 24 divisors (see below), whose sum is σ = 34493706240. Its totient is φ = 9766213632.

The previous prime is 19621491091. The next prime is 19621491133. The reversal of 19621491116 is 61119412691.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1269845 + ... + 1285203.

It is an arithmetic number, because the mean of its divisors is an integer number (1437237760).

Almost surely, 2^19621491116 is an apocalyptic number.

It is an amenable number.

19621491116 is a deficient number, since it is larger than the sum of its proper divisors (14872215124).

19621491116 is a wasteful number, since it uses less digits than its factorization.

19621491116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16793 (or 16791 counting only the distinct ones).

The product of its digits is 23328, while the sum is 41.

The spelling of 19621491116 in words is "nineteen billion, six hundred twenty-one million, four hundred ninety-one thousand, one hundred sixteen".