19194328080 has 160 divisors (see below), whose sum is σ = 66186835200. Its totient is φ = 5112834048.

The previous prime is 19194328039. The next prime is 19194328081. The reversal of 19194328080 is 8082349191.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (19194328081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2175037 + ... + 2183843.

It is an arithmetic number, because the mean of its divisors is an integer number (413667720).

Almost surely, 2^19194328080 is an apocalyptic number.

19194328080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19194328080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33093417600).

19194328080 is an abundant number, since it is smaller than the sum of its proper divisors (46992507120).

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

19194328080 is a wasteful number, since it uses less digits than its factorization.

19194328080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9838 (or 9826 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 19194328080 in words is "nineteen billion, one hundred ninety-four million, three hundred twenty-eight thousand, eighty".