20199965875 has 8 divisors (see below), whose sum is σ = 25209557568. Its totient is φ = 16159972600.

The previous prime is 20199965861. The next prime is 20199965911. The reversal of 20199965875 is 57856999102.

It is not a de Polignac number, because 20199965875 - 2¹³ = 20199957683 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80799739 + ... + 80799988.

It is an arithmetic number, because the mean of its divisors is an integer number (3151194696).

Almost surely, 2^20199965875 is an apocalyptic number.

20199965875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20199965875 is a deficient number, since it is larger than the sum of its proper divisors (5009591693).

20199965875 is an equidigital number, since it uses as much as digits as its factorization.

20199965875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161599742 (or 161599732 counting only the distinct ones).

The product of its (nonzero) digits is 12247200, while the sum is 61.

The spelling of 20199965875 in words is "twenty billion, one hundred ninety-nine million, nine hundred sixty-five thousand, eight hundred seventy-five".