20312100503242 has 16 divisors (see below), whose sum is σ = 30528455722632. Its totient is φ = 10135957248000.

The previous prime is 20312100503213. The next prime is 20312100503243. The reversal of 20312100503242 is 24230500121302.

It can be written as a sum of positive squares in 4 ways, for example, as 20227245395841 + 84855107401 = 4497471^2 + 291299^2 .

It is not an unprimeable number, because it can be changed into a prime (20312100503243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2539492 + ... + 6860992.

Almost surely, 2^{20312100503242} is an apocalyptic number.

20312100503242 is a deficient number, since it is larger than the sum of its proper divisors (10216355219390).

20312100503242 is a wasteful number, since it uses less digits than its factorization.

20312100503242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4326153.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 20312100503242 its reverse (24230500121302), we get a palindrome (44542600624544).

The spelling of 20312100503242 in words is "twenty trillion, three hundred twelve billion, one hundred million, five hundred three thousand, two hundred forty-two".