20704631085 has 24 divisors (see below), whose sum is σ = 36258014520. Its totient is φ = 10928627712.

The previous prime is 20704631083. The next prime is 20704631099. The reversal of 20704631085 is 58013640702.

20704631085 is a `hidden beast` number, since 20 + 70 + 463 + 108 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5372743401 + 15331887684 = 73299^2 + 123822^2 .

It is not a de Polignac number, because 20704631085 - 2¹ = 20704631083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20704631081) 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 23 ways as a sum of consecutive naturals, for example, 2367300 + ... + 2376029.

It is an arithmetic number, because the mean of its divisors is an integer number (1510750605).

Almost surely, 2^20704631085 is an apocalyptic number.

It is an amenable number.

20704631085 is a deficient number, since it is larger than the sum of its proper divisors (15553383435).

20704631085 is a wasteful number, since it uses less digits than its factorization.

20704631085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4743437 (or 4743434 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 20704631085 in words is "twenty billion, seven hundred four million, six hundred thirty-one thousand, eighty-five".