19190911020 has 48 divisors (see below), whose sum is σ = 54266593248. Its totient is φ = 5066905600.

The previous prime is 19190911009. The next prime is 19190911021. The reversal of 19190911020 is 2011909191.

It is not an unprimeable number, because it can be changed into a prime (19190911021) 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 15 ways as a sum of consecutive naturals, for example, 1577349 + ... + 1589468.

It is an arithmetic number, because the mean of its divisors is an integer number (1130554026).

Almost surely, 2^19190911020 is an apocalyptic number.

19190911020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19190911020 is an abundant number, since it is smaller than the sum of its proper divisors (35075682228).

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

19190911020 is a wasteful number, since it uses less digits than its factorization.

19190911020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3166930 (or 3166928 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 33.

The spelling of 19190911020 in words is "nineteen billion, one hundred ninety million, nine hundred eleven thousand, twenty".