20312102311 has 4 divisors (see below), whose sum is σ = 20359012912. Its totient is φ = 20265191712.

The previous prime is 20312102287. The next prime is 20312102353. The reversal of 20312102311 is 11320121302.

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 20312102311 - 2¹³ = 20312094119 is a prime.

It is a super-3 number, since 3×20312102311³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312102011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23454651 + ... + 23455516.

It is an arithmetic number, because the mean of its divisors is an integer number (5089753228).

Almost surely, 2^20312102311 is an apocalyptic number.

20312102311 is a deficient number, since it is larger than the sum of its proper divisors (46910601).

20312102311 is an equidigital number, since it uses as much as digits as its factorization.

20312102311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46910600.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20312102311 its reverse (11320121302), we get a palindrome (31632223613).

The spelling of 20312102311 in words is "twenty billion, three hundred twelve million, one hundred two thousand, three hundred eleven".