19384638212 has 12 divisors (see below), whose sum is σ = 35918594460. Its totient is φ = 9122182656.

The previous prime is 19384638209. The next prime is 19384638227. The reversal of 19384638212 is 21283648391.

It can be written as a sum of positive squares in 2 ways, for example, as 10205848576 + 9178789636 = 101024^2 + 95806^2 .

It is a super-3 number, since 3×19384638212³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 3 ways as a sum of consecutive naturals, for example, 142534037 + ... + 142534172.

It is an arithmetic number, because the mean of its divisors is an integer number (2993216205).

Almost surely, 2^19384638212 is an apocalyptic number.

It is an amenable number.

19384638212 is a deficient number, since it is larger than the sum of its proper divisors (16533956248).

19384638212 is a wasteful number, since it uses less digits than its factorization.

19384638212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285068230 (or 285068228 counting only the distinct ones).

The product of its digits is 497664, while the sum is 47.

The spelling of 19384638212 in words is "nineteen billion, three hundred eighty-four million, six hundred thirty-eight thousand, two hundred twelve".