20302403636 has 12 divisors (see below), whose sum is σ = 36754351620. Its totient is φ = 9801160320.

The previous prime is 20302403609. The next prime is 20302403647. The reversal of 20302403636 is 63630420302.

It can be written as a sum of positive squares in 2 ways, for example, as 5571726736 + 14730676900 = 74644^2 + 121370^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 20302403599 and 20302403608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87510245 + ... + 87510476.

It is an arithmetic number, because the mean of its divisors is an integer number (3062862635).

Almost surely, 2^20302403636 is an apocalyptic number.

It is an amenable number.

20302403636 is a deficient number, since it is larger than the sum of its proper divisors (16451947984).

20302403636 is a wasteful number, since it uses less digits than its factorization.

20302403636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175020754 (or 175020752 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 29.

Adding to 20302403636 its reverse (63630420302), we get a palindrome (83932823938).

The spelling of 20302403636 in words is "twenty billion, three hundred two million, four hundred three thousand, six hundred thirty-six".