20311213013 has 16 divisors (see below), whose sum is σ = 25579779456. Its totient is φ = 15696676800.

The previous prime is 20311213001. The next prime is 20311213031. The reversal of 20311213013 is 31031211302.

It is not a de Polignac number, because 20311213013 - 2²⁶ = 20244104149 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20311212982 and 20311213000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311213073) 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 15 ways as a sum of consecutive naturals, for example, 2591438 + ... + 2599263.

It is an arithmetic number, because the mean of its divisors is an integer number (1598736216).

Almost surely, 2^20311213013 is an apocalyptic number.

It is an amenable number.

20311213013 is a deficient number, since it is larger than the sum of its proper divisors (5268566443).

20311213013 is a wasteful number, since it uses less digits than its factorization.

20311213013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5190764.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20311213013 its reverse (31031211302), we get a palindrome (51342424315).

The spelling of 20311213013 in words is "twenty billion, three hundred eleven million, two hundred thirteen thousand, thirteen".