19619813108 has 12 divisors (see below), whose sum is σ = 39239626272. Its totient is φ = 8408491320.

The previous prime is 19619813069. The next prime is 19619813111. The reversal of 19619813108 is 80131891691.

19619813108 is an admirable number.

It is a congruent number.

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, 350353778 + ... + 350353833.

It is an arithmetic number, because the mean of its divisors is an integer number (3269968856).

Almost surely, 2^19619813108 is an apocalyptic number.

It is an amenable number.

19619813108 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19619813108 is a wasteful number, since it uses less digits than its factorization.

19619813108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700707622 (or 700707620 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 47.

The spelling of 19619813108 in words is "nineteen billion, six hundred nineteen million, eight hundred thirteen thousand, one hundred eight".