19059121808 has 20 divisors (see below), whose sum is σ = 37006135920. Its totient is φ = 9509151264.

The previous prime is 19059121801. The next prime is 19059121843. The reversal of 19059121808 is 80812195091.

It is not an unprimeable number, because it can be changed into a prime (19059121801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1267898 + ... + 1282841.

It is an arithmetic number, because the mean of its divisors is an integer number (1850306796).

Almost surely, 2^19059121808 is an apocalyptic number.

It is an amenable number.

19059121808 is a deficient number, since it is larger than the sum of its proper divisors (17947014112).

19059121808 is a wasteful number, since it uses less digits than its factorization.

19059121808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2551214 (or 2551208 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 44.

The spelling of 19059121808 in words is "nineteen billion, fifty-nine million, one hundred twenty-one thousand, eight hundred eight".