20312357536 has 24 divisors (see below), whose sum is σ = 40356841140. Its totient is φ = 10063001088.

The previous prime is 20312357489. The next prime is 20312357557. The reversal of 20312357536 is 63575321302.

It can be written as a sum of positive squares in 2 ways, for example, as 19762736400 + 549621136 = 140580^2 + 23444^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20312357495 and 20312357504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2908261 + ... + 2915236.

Almost surely, 2^20312357536 is an apocalyptic number.

It is an amenable number.

20312357536 is a deficient number, since it is larger than the sum of its proper divisors (20044483604).

20312357536 is a wasteful number, since it uses less digits than its factorization.

20312357536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5823616 (or 5823608 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 37.

Adding to 20312357536 its reverse (63575321302), we get a palindrome (83887678838).

The spelling of 20312357536 in words is "twenty billion, three hundred twelve million, three hundred fifty-seven thousand, five hundred thirty-six".