20311333240231 has 16 divisors (see below), whose sum is σ = 22625301415968. Its totient is φ = 18078971558400.

The previous prime is 20311333240153. The next prime is 20311333240271. The reversal of 20311333240231 is 13204233311302.

It is a cyclic number.

It is not a de Polignac number, because 20311333240231 - 2¹⁵ = 20311333207463 is a prime.

It is a super-2 number, since 2×20311333240231² (a number of 27 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 20311333240231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311333240271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92205000 + ... + 92425021.

It is an arithmetic number, because the mean of its divisors is an integer number (1414081338498).

Almost surely, 2^{20311333240231} is an apocalyptic number.

20311333240231 is a deficient number, since it is larger than the sum of its proper divisors (2313968175737).

20311333240231 is a wasteful number, since it uses less digits than its factorization.

20311333240231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184630242.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 20311333240231 its reverse (13204233311302), we get a palindrome (33515566551533).

The spelling of 20311333240231 in words is "twenty trillion, three hundred eleven billion, three hundred thirty-three million, two hundred forty thousand, two hundred thirty-one".