20605611325 has 12 divisors (see below), whose sum is σ = 27516416788. Its totient is φ = 15216451200.

The previous prime is 20605611293. The next prime is 20605611329. The reversal of 20605611325 is 52311650602.

It can be written as a sum of positive squares in 6 ways, for example, as 1714208409 + 18891402916 = 41403^2 + 137446^2 .

It is not a de Polignac number, because 20605611325 - 2⁵ = 20605611293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20605611329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31700616 + ... + 31701265.

Almost surely, 2^20605611325 is an apocalyptic number.

20605611325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20605611325 is a deficient number, since it is larger than the sum of its proper divisors (6910805463).

20605611325 is a wasteful number, since it uses less digits than its factorization.

20605611325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63401904 (or 63401899 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 20605611325 in words is "twenty billion, six hundred five million, six hundred eleven thousand, three hundred twenty-five".