19428198879 has 8 divisors (see below), whose sum is σ = 25914017920. Its totient is φ = 12947256216.

The previous prime is 19428198871. The next prime is 19428198887. The reversal of 19428198879 is 97889182491.

It is an interprime number because it is at equal distance from previous prime (19428198871) and next prime (19428198887).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19428198879 - 2³ = 19428198871 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 (19428198871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1209787 + ... + 1225740.

It is an arithmetic number, because the mean of its divisors is an integer number (3239252240).

Almost surely, 2^19428198879 is an apocalyptic number.

19428198879 is a deficient number, since it is larger than the sum of its proper divisors (6485819041).

19428198879 is a wasteful number, since it uses less digits than its factorization.

19428198879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2438189.

The product of its digits is 20901888, while the sum is 66.

The spelling of 19428198879 in words is "nineteen billion, four hundred twenty-eight million, one hundred ninety-eight thousand, eight hundred seventy-nine".