20003111311 has 12 divisors (see below), whose sum is σ = 21142582920. Its totient is φ = 18902366000.

The previous prime is 20003111267. The next prime is 20003111363. The reversal of 20003111311 is 11311130002.

It is a de Polignac number, because none of the positive numbers 2^k-20003111311 is a prime.

It is a super-2 number, since 2×20003111311² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20003111291 and 20003111300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003111411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92065 + ... + 220186.

It is an arithmetic number, because the mean of its divisors is an integer number (1761881910).

Almost surely, 2^20003111311 is an apocalyptic number.

20003111311 is a deficient number, since it is larger than the sum of its proper divisors (1139471609).

20003111311 is an equidigital number, since it uses as much as digits as its factorization.

20003111311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312374 (or 312327 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 20003111311 its reverse (11311130002), we get a palindrome (31314241313).

The spelling of 20003111311 in words is "twenty billion, three million, one hundred eleven thousand, three hundred eleven".