19685215204 has 12 divisors (see below), whose sum is σ = 34459904304. Its totient is φ = 9839528264.

The previous prime is 19685215169. The next prime is 19685215271. The reversal of 19685215204 is 40251258691.

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, 755422 + ... + 781045.

It is an arithmetic number, because the mean of its divisors is an integer number (2871658692).

Almost surely, 2^19685215204 is an apocalyptic number.

It is an amenable number.

19685215204 is a deficient number, since it is larger than the sum of its proper divisors (14774689100).

19685215204 is a wasteful number, since it uses less digits than its factorization.

19685215204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539674 (or 1539672 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 19685215204 in words is "nineteen billion, six hundred eighty-five million, two hundred fifteen thousand, two hundred four".