20031312203 has 16 divisors (see below), whose sum is σ = 23288509440. Its totient is φ = 16874199936.

The previous prime is 20031312199. The next prime is 20031312241. The reversal of 20031312203 is 30221313002.

It is a cyclic number.

It is not a de Polignac number, because 20031312203 - 2² = 20031312199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20031312293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153758 + ... + 252396.

It is an arithmetic number, because the mean of its divisors is an integer number (1455531840).

Almost surely, 2^20031312203 is an apocalyptic number.

20031312203 is a deficient number, since it is larger than the sum of its proper divisors (3257197237).

20031312203 is an equidigital number, since it uses as much as digits as its factorization.

20031312203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99146.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20031312203 its reverse (30221313002), we get a palindrome (50252625205).

The spelling of 20031312203 in words is "twenty billion, thirty-one million, three hundred twelve thousand, two hundred three".