20065871913 has 4 divisors (see below), whose sum is σ = 26754495888. Its totient is φ = 13377247940.

The previous prime is 20065871863. The next prime is 20065871929. The reversal of 20065871913 is 31917856002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20065871913 - 2¹⁷ = 20065740841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20065871993) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3344311983 + ... + 3344311988.

It is an arithmetic number, because the mean of its divisors is an integer number (6688623972).

Almost surely, 2^20065871913 is an apocalyptic number.

It is an amenable number.

20065871913 is a deficient number, since it is larger than the sum of its proper divisors (6688623975).

20065871913 is an equidigital number, since it uses as much as digits as its factorization.

20065871913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6688623974.

The product of its (nonzero) digits is 90720, while the sum is 42.

The spelling of 20065871913 in words is "twenty billion, sixty-five million, eight hundred seventy-one thousand, nine hundred thirteen".