19206781672 has 32 divisors (see below), whose sum is σ = 40469143680. Its totient is φ = 8479247040.

The previous prime is 19206781669. The next prime is 19206781681. The reversal of 19206781672 is 27618760291.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

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, 4012404 + ... + 4017187.

It is an arithmetic number, because the mean of its divisors is an integer number (1264660740).

Almost surely, 2^19206781672 is an apocalyptic number.

It is an amenable number.

19206781672 is an abundant number, since it is smaller than the sum of its proper divisors (21262362008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19206781672 is a wasteful number, since it uses less digits than its factorization.

19206781672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8029633 (or 8029629 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 49.

The spelling of 19206781672 in words is "nineteen billion, two hundred six million, seven hundred eighty-one thousand, six hundred seventy-two".