20119019913 has 6 divisors (see below), whose sum is σ = 29060806554. Its totient is φ = 13412679936.

The previous prime is 20119019909. The next prime is 20119019927. The reversal of 20119019913 is 31991091102.

It can be written as a sum of positive squares in only one way, i.e., 17703100809 + 2415919104 = 133053^2 + 49152^2 .

It is not a de Polignac number, because 20119019913 - 2² = 20119019909 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20119019213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1117723320 + ... + 1117723337.

It is an arithmetic number, because the mean of its divisors is an integer number (4843467759).

Almost surely, 2^20119019913 is an apocalyptic number.

It is an amenable number.

20119019913 is a deficient number, since it is larger than the sum of its proper divisors (8941786641).

20119019913 is a wasteful number, since it uses less digits than its factorization.

20119019913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2235446663 (or 2235446660 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 36.

The spelling of 20119019913 in words is "twenty billion, one hundred nineteen million, nineteen thousand, nine hundred thirteen".