19503800811 has 16 divisors (see below), whose sum is σ = 31521294720. Its totient is φ = 11820485160.

The previous prime is 19503800761. The next prime is 19503800831. The reversal of 19503800811 is 11800830591.

It is not a de Polignac number, because 19503800811 - 2⁶ = 19503800747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19503800831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32834385 + ... + 32834978.

It is an arithmetic number, because the mean of its divisors is an integer number (1970080920).

Almost surely, 2^19503800811 is an apocalyptic number.

19503800811 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

19503800811 is a deficient number, since it is larger than the sum of its proper divisors (12017493909).

19503800811 is a wasteful number, since it uses less digits than its factorization.

19503800811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65669383 (or 65669377 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 36.

The spelling of 19503800811 in words is "nineteen billion, five hundred three million, eight hundred thousand, eight hundred eleven".