20003012311 has 4 divisors (see below), whose sum is σ = 21179660112. Its totient is φ = 18826364512.

The previous prime is 20003012297. The next prime is 20003012317. The reversal of 20003012311 is 11321030002.

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 20003012311 - 2²⁹ = 19466141399 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20003012291 and 20003012300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003012317) 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 3 ways as a sum of consecutive naturals, for example, 588323875 + ... + 588323908.

It is an arithmetic number, because the mean of its divisors is an integer number (5294915028).

Almost surely, 2^20003012311 is an apocalyptic number.

20003012311 is a deficient number, since it is larger than the sum of its proper divisors (1176647801).

20003012311 is a wasteful number, since it uses less digits than its factorization.

20003012311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176647800.

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

Adding to 20003012311 its reverse (11321030002), we get a palindrome (31324042313).

The spelling of 20003012311 in words is "twenty billion, three million, twelve thousand, three hundred eleven".