19199954079 has 12 divisors (see below), whose sum is σ = 27779420032. Its totient is φ = 12778668000.

The previous prime is 19199954021. The next prime is 19199954089. The reversal of 19199954079 is 97045999191.

19199954079 is a `hidden beast` number, since 1 + 9 + 19 + 9 + 9 + 540 + 79 = 666.

It is not a de Polignac number, because 19199954079 - 2¹³ = 19199945887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19199954089) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1769407 + ... + 1780224.

Almost surely, 2^19199954079 is an apocalyptic number.

19199954079 is a deficient number, since it is larger than the sum of its proper divisors (8579465953).

19199954079 is a wasteful number, since it uses less digits than its factorization.

19199954079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3550238 (or 3550235 counting only the distinct ones).

The product of its (nonzero) digits is 8266860, while the sum is 63.

The spelling of 19199954079 in words is "nineteen billion, one hundred ninety-nine million, nine hundred fifty-four thousand, seventy-nine".