20003120311 has 4 divisors (see below), whose sum is σ = 20009187000. Its totient is φ = 19997053624.

The previous prime is 20003120299. The next prime is 20003120317. The reversal of 20003120311 is 11302130002.

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 20003120311 - 2⁵ = 20003120279 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20003120291 and 20003120300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003120317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3028396 + ... + 3034993.

It is an arithmetic number, because the mean of its divisors is an integer number (5002296750).

Almost surely, 2^20003120311 is an apocalyptic number.

20003120311 is a deficient number, since it is larger than the sum of its proper divisors (6066689).

20003120311 is an equidigital number, since it uses as much as digits as its factorization.

20003120311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6066688.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 20003120311 its reverse (11302130002), we get a palindrome (31305250313).

The spelling of 20003120311 in words is "twenty billion, three million, one hundred twenty thousand, three hundred eleven".