20312132311 has 4 divisors (see below), whose sum is σ = 20656405800. Its totient is φ = 19967858824.

The previous prime is 20312132299. The next prime is 20312132317. The reversal of 20312132311 is 11323121302.

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 20312132311 - 2¹⁵ = 20312099543 is a prime.

It is a super-3 number, since 3×20312132311³ (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 (20312132317) 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, 172136656 + ... + 172136773.

It is an arithmetic number, because the mean of its divisors is an integer number (5164101450).

Almost surely, 2^20312132311 is an apocalyptic number.

20312132311 is a deficient number, since it is larger than the sum of its proper divisors (344273489).

20312132311 is an equidigital number, since it uses as much as digits as its factorization.

20312132311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344273488.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20312132311 its reverse (11323121302), we get a palindrome (31635253613).

The spelling of 20312132311 in words is "twenty billion, three hundred twelve million, one hundred thirty-two thousand, three hundred eleven".