19478386252 has 12 divisors (see below), whose sum is σ = 36709266496. Its totient is φ = 8990024400.

The previous prime is 19478386247. The next prime is 19478386253. The reversal of 19478386252 is 25268387491.

It is a junction number, because it is equal to n+sod(n) for n = 19478386193 and 19478386202.

It is not an unprimeable number, because it can be changed into a prime (19478386253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187292124 + ... + 187292227.

Almost surely, 2^19478386252 is an apocalyptic number.

It is an amenable number.

19478386252 is a deficient number, since it is larger than the sum of its proper divisors (17230880244).

19478386252 is a wasteful number, since it uses less digits than its factorization.

19478386252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374584368 (or 374584366 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 55.

The spelling of 19478386252 in words is "nineteen billion, four hundred seventy-eight million, three hundred eighty-six thousand, two hundred fifty-two".