20311133103 has 8 divisors (see below), whose sum is σ = 30090567600. Its totient is φ = 13540755384.

The previous prime is 20311133083. The next prime is 20311133107. The reversal of 20311133103 is 30133111302.

It is a happy number.

20311133103 is a `hidden beast` number, since 20 + 311 + 1 + 331 + 0 + 3 = 666.

It is not a de Polignac number, because 20311133103 - 2⁸ = 20311132847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311133107) 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, 376132068 + ... + 376132121.

It is an arithmetic number, because the mean of its divisors is an integer number (3761320950).

Almost surely, 2^20311133103 is an apocalyptic number.

20311133103 is a deficient number, since it is larger than the sum of its proper divisors (9779434497).

20311133103 is an equidigital number, since it uses as much as digits as its factorization.

20311133103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752264198 (or 752264192 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 20311133103 its reverse (30133111302), we get a palindrome (50444244405).

The spelling of 20311133103 in words is "twenty billion, three hundred eleven million, one hundred thirty-three thousand, one hundred three".