19110120920 has 64 divisors (see below), whose sum is σ = 49665895200. Its totient is φ = 6540359680.

The previous prime is 19110120917. The next prime is 19110120949. The reversal of 19110120920 is 2902101191.

It is a self number, because there is not a number n which added to its sum of digits gives 19110120920.

It is a congruent number.

It is an unprimeable number.

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, 1269935 + ... + 1284894.

Almost surely, 2^19110120920 is an apocalyptic number.

19110120920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19110120920 is an abundant number, since it is smaller than the sum of its proper divisors (30555774280).

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

19110120920 is a wasteful number, since it uses less digits than its factorization.

19110120920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554868 (or 2554864 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 26.

The spelling of 19110120920 in words is "nineteen billion, one hundred ten million, one hundred twenty thousand, nine hundred twenty".