20311123203 has 24 divisors (see below), whose sum is σ = 33535932768. Its totient is φ = 11604120192.

The previous prime is 20311123171. The next prime is 20311123207. The reversal of 20311123203 is 30232111302.

20311123203 is a `hidden beast` number, since 20 + 311 + 12 + 320 + 3 = 666.

It is not a de Polignac number, because 20311123203 - 2⁵ = 20311123171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20311123207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 331975 + ... + 388367.

It is an arithmetic number, because the mean of its divisors is an integer number (1397330532).

Almost surely, 2^20311123203 is an apocalyptic number.

20311123203 is a deficient number, since it is larger than the sum of its proper divisors (13224809565).

20311123203 is a wasteful number, since it uses less digits than its factorization.

20311123203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62123 (or 62120 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20311123203 its reverse (30232111302), we get a palindrome (50543234505).

The spelling of 20311123203 in words is "twenty billion, three hundred eleven million, one hundred twenty-three thousand, two hundred three".