20312312203 has 4 divisors (see below), whose sum is σ = 20540540520. Its totient is φ = 20084083888.

The previous prime is 20312312201. The next prime is 20312312221. The reversal of 20312312203 is 30221321302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20312312203 - 2¹ = 20312312201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20312312201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114114025 + ... + 114114202.

It is an arithmetic number, because the mean of its divisors is an integer number (5135135130).

Almost surely, 2^20312312203 is an apocalyptic number.

20312312203 is a deficient number, since it is larger than the sum of its proper divisors (228228317).

20312312203 is an equidigital number, since it uses as much as digits as its factorization.

20312312203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228228316.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20312312203 its reverse (30221321302), we get a palindrome (50533633505).

Subtracting 20312312203 from its reverse (30221321302), we obtain a palindrome (9909009099).

The spelling of 20312312203 in words is "twenty billion, three hundred twelve million, three hundred twelve thousand, two hundred three".