19713634448 has 40 divisors (see below), whose sum is σ = 38374421856. Its totient is φ = 9810662400.

The previous prime is 19713634387. The next prime is 19713634453. The reversal of 19713634448 is 84443631791.

It is a junction number, because it is equal to n+sod(n) for n = 19713634396 and 19713634405.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3561443 + ... + 3566973.

Almost surely, 2^19713634448 is an apocalyptic number.

It is an amenable number.

19713634448 is a deficient number, since it is larger than the sum of its proper divisors (18660787408).

19713634448 is a wasteful number, since it uses less digits than its factorization.

19713634448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6543 (or 6537 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 50.

The spelling of 19713634448 in words is "nineteen billion, seven hundred thirteen million, six hundred thirty-four thousand, four hundred forty-eight".