19208478198 has 64 divisors (see below), whose sum is σ = 49338196992. Its totient is φ = 4845709440.

The previous prime is 19208478173. The next prime is 19208478227. The reversal of 19208478198 is 89187480291.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 752233 + ... + 777348.

It is an arithmetic number, because the mean of its divisors is an integer number (770909328).

Almost surely, 2^19208478198 is an apocalyptic number.

19208478198 is an abundant number, since it is smaller than the sum of its proper divisors (30129718794).

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

19208478198 is a wasteful number, since it uses less digits than its factorization.

19208478198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529629.

The product of its (nonzero) digits is 2322432, while the sum is 57.

The spelling of 19208478198 in words is "nineteen billion, two hundred eight million, four hundred seventy-eight thousand, one hundred ninety-eight".