19913481212 has 12 divisors (see below), whose sum is σ = 34929076896. Its totient is φ = 9933744960.

The previous prime is 19913481197. The next prime is 19913481223. The reversal of 19913481212 is 21218431991.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 19913481212.

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, 5746964 + ... + 5750427.

It is an arithmetic number, because the mean of its divisors is an integer number (2910756408).

Almost surely, 2^19913481212 is an apocalyptic number.

It is an amenable number.

19913481212 is a deficient number, since it is larger than the sum of its proper divisors (15015595684).

19913481212 is a wasteful number, since it uses less digits than its factorization.

19913481212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11497828 (or 11497826 counting only the distinct ones).

The product of its digits is 31104, while the sum is 41.

The spelling of 19913481212 in words is "nineteen billion, nine hundred thirteen million, four hundred eighty-one thousand, two hundred twelve".