20032131311 has 4 divisors (see below), whose sum is σ = 20115948000. Its totient is φ = 19948314624.

The previous prime is 20032131299. The next prime is 20032131341. The reversal of 20032131311 is 11313123002.

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 20032131311 - 2¹⁸ = 20031869167 is a prime.

It is a super-2 number, since 2×20032131311² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20032131311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20032131341) 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, 41907986 + ... + 41908463.

It is an arithmetic number, because the mean of its divisors is an integer number (5028987000).

Almost surely, 2^20032131311 is an apocalyptic number.

20032131311 is a deficient number, since it is larger than the sum of its proper divisors (83816689).

20032131311 is an equidigital number, since it uses as much as digits as its factorization.

20032131311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83816688.

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

Adding to 20032131311 its reverse (11313123002), we get a palindrome (31345254313).

The spelling of 20032131311 in words is "twenty billion, thirty-two million, one hundred thirty-one thousand, three hundred eleven".