19804667312 has 10 divisors (see below), whose sum is σ = 38371542948. Its totient is φ = 9902333648.

The previous prime is 19804667291. The next prime is 19804667329. The reversal of 19804667312 is 21376640891.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 618895838 + ... + 618895869.

Almost surely, 2^19804667312 is an apocalyptic number.

It is an amenable number.

19804667312 is a deficient number, since it is larger than the sum of its proper divisors (18566875636).

19804667312 is a wasteful number, since it uses less digits than its factorization.

19804667312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237791715 (or 1237791709 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 19804667312 in words is "nineteen billion, eight hundred four million, six hundred sixty-seven thousand, three hundred twelve".