20636131653 has 12 divisors (see below), whose sum is σ = 29997606028. Its totient is φ = 13669793280.

The previous prime is 20636131643. The next prime is 20636131673. The reversal of 20636131653 is 35613163602.

20636131653 is a `hidden beast` number, since 2 + 0 + 636 + 1 + 3 + 16 + 5 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10105677729 + 10530453924 = 100527^2 + 102618^2 .

It is not a de Polignac number, because 20636131653 - 2¹² = 20636127557 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 (20636131613) 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 11 ways as a sum of consecutive naturals, for example, 7300828 + ... + 7303653.

Almost surely, 2^20636131653 is an apocalyptic number.

It is an amenable number.

20636131653 is a deficient number, since it is larger than the sum of its proper divisors (9361474375).

20636131653 is a wasteful number, since it uses less digits than its factorization.

20636131653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14604644 (or 14604641 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The spelling of 20636131653 in words is "twenty billion, six hundred thirty-six million, one hundred thirty-one thousand, six hundred fifty-three".