19431384212 has 12 divisors (see below), whose sum is σ = 34006142100. Its totient is φ = 9715343616.

The previous prime is 19431384179. The next prime is 19431384233. The reversal of 19431384212 is 21248313491.

It can be written as a sum of positive squares in 2 ways, for example, as 1995766276 + 17435617936 = 44674^2 + 132044^2 .

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, 69698 + ... + 209094.

It is an arithmetic number, because the mean of its divisors is an integer number (2833845175).

Almost surely, 2^19431384212 is an apocalyptic number.

It is a pronic number, being equal to 139396×139397.

It is an amenable number.

19431384212 is a deficient number, since it is larger than the sum of its proper divisors (14574757888).

19431384212 is a wasteful number, since it uses less digits than its factorization.

19431384212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174250 (or 174248 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The spelling of 19431384212 in words is "nineteen billion, four hundred thirty-one million, three hundred eighty-four thousand, two hundred twelve".