19020818208 has 192 divisors, whose sum is σ = 60385554432. Its totient is φ = 5124725760.

The previous prime is 19020818183. The next prime is 19020818209. The reversal of 19020818208 is 80281802091.

It is not an unprimeable number, because it can be changed into a prime (19020818209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1088710 + ... + 1106042.

It is an arithmetic number, because the mean of its divisors is an integer number (314508096).

Almost surely, 2^19020818208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19020818208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30192777216).

19020818208 is an abundant number, since it is smaller than the sum of its proper divisors (41364736224).

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

19020818208 is a wasteful number, since it uses less digits than its factorization.

19020818208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17447 (or 17439 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 39.

The spelling of 19020818208 in words is "nineteen billion, twenty million, eight hundred eighteen thousand, two hundred eight".