19910412204 has 12 divisors (see below), whose sum is σ = 46457628504. Its totient is φ = 6636804064.

The previous prime is 19910412199. The next prime is 19910412281. The reversal of 19910412204 is 40221401991.

It is a tau number, because it is divible by the number of its divisors (12).

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, 829600497 + ... + 829600520.

It is an arithmetic number, because the mean of its divisors is an integer number (3871469042).

Almost surely, 2^19910412204 is an apocalyptic number.

It is an amenable number.

19910412204 is an abundant number, since it is smaller than the sum of its proper divisors (26547216300).

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

19910412204 is a wasteful number, since it uses less digits than its factorization.

19910412204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1659201024 (or 1659201022 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The spelling of 19910412204 in words is "nineteen billion, nine hundred ten million, four hundred twelve thousand, two hundred four".