19099678794 has 128 divisors (see below), whose sum is σ = 45317283840. Its totient is φ = 5254239744.

The previous prime is 19099678753. The next prime is 19099678813. The reversal of 19099678794 is 49787699091.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 55042129 + ... + 55042475.

It is an arithmetic number, because the mean of its divisors is an integer number (354041280).

Almost surely, 2^19099678794 is an apocalyptic number.

19099678794 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19099678794, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22658641920).

19099678794 is an abundant number, since it is smaller than the sum of its proper divisors (26217605046).

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

19099678794 is a wasteful number, since it uses less digits than its factorization.

19099678794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804.

The product of its (nonzero) digits is 61725888, while the sum is 69.

The spelling of 19099678794 in words is "nineteen billion, ninety-nine million, six hundred seventy-eight thousand, seven hundred ninety-four".