19899115875 has 24 divisors (see below), whose sum is σ = 35871474912. Its totient is φ = 10612861200.

The previous prime is 19899115871. The next prime is 19899115913. The reversal of 19899115875 is 57851199891.

It is not a de Polignac number, because 19899115875 - 2² = 19899115871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19899115871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8842927 + ... + 8845176.

It is an arithmetic number, because the mean of its divisors is an integer number (1494644788).

Almost surely, 2^19899115875 is an apocalyptic number.

19899115875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19899115875 is a deficient number, since it is larger than the sum of its proper divisors (15972359037).

19899115875 is a wasteful number, since it uses less digits than its factorization.

19899115875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17688124 (or 17688111 counting only the distinct ones).

The product of its digits is 8164800, while the sum is 63.

The spelling of 19899115875 in words is "nineteen billion, eight hundred ninety-nine million, one hundred fifteen thousand, eight hundred seventy-five".