19912708179 has 48 divisors (see below), whose sum is σ = 35980794304. Its totient is φ = 10331193600.

The previous prime is 19912708157. The next prime is 19912708271. The reversal of 19912708179 is 97180721991.

It is not a de Polignac number, because 19912708179 - 2¹⁶ = 19912642643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19912708139) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 149332 + ... + 249249.

Almost surely, 2^19912708179 is an apocalyptic number.

19912708179 is a deficient number, since it is larger than the sum of its proper divisors (16068086125).

19912708179 is a wasteful number, since it uses less digits than its factorization.

19912708179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398668 (or 398665 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 54.

The spelling of 19912708179 in words is "nineteen billion, nine hundred twelve million, seven hundred eight thousand, one hundred seventy-nine".