20311210203 has 16 divisors (see below), whose sum is σ = 27478118400. Its totient is φ = 13343986656.

The previous prime is 20311210169. The next prime is 20311210237. The reversal of 20311210203 is 30201211302.

It is an interprime number because it is at equal distance from previous prime (20311210169) and next prime (20311210237).

It is not a de Polignac number, because 20311210203 - 2⁹ = 20311209691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20311210253) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 122125 + ... + 235662.

It is an arithmetic number, because the mean of its divisors is an integer number (1717382400).

Almost surely, 2^20311210203 is an apocalyptic number.

20311210203 is a deficient number, since it is larger than the sum of its proper divisors (7166908197).

20311210203 is a wasteful number, since it uses less digits than its factorization.

20311210203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358066.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20311210203 its reverse (30201211302), we get a palindrome (50512421505).

The spelling of 20311210203 in words is "twenty billion, three hundred eleven million, two hundred ten thousand, two hundred three".