20304110613161 has 16 divisors (see below), whose sum is σ = 21505189547088. Its totient is φ = 19103779430400.

The previous prime is 20304110613133. The next prime is 20304110613181. The reversal of 20304110613161 is 16131601140302.

It can be written as a sum of positive squares in 8 ways, for example, as 2589103046761 + 17715007566400 = 1609069^2 + 4208920^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20304110613161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20304110613181) 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, 1015550981 + ... + 1015570973.

It is an arithmetic number, because the mean of its divisors is an integer number (1344074346693).

Almost surely, 2^{20304110613161} is an apocalyptic number.

It is an amenable number.

20304110613161 is a deficient number, since it is larger than the sum of its proper divisors (1201078933927).

20304110613161 is a wasteful number, since it uses less digits than its factorization.

20304110613161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35692.

The product of its (nonzero) digits is 2592, while the sum is 29.

Adding to 20304110613161 its reverse (16131601140302), we get a palindrome (36435711753463).

The spelling of 20304110613161 in words is "twenty trillion, three hundred four billion, one hundred ten million, six hundred thirteen thousand, one hundred sixty-one".