20132311231 has 4 divisors (see below), whose sum is σ = 20143604272. Its totient is φ = 20121018192.

The previous prime is 20132311211. The next prime is 20132311273. The reversal of 20132311231 is 13211323102.

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 20132311231 - 2¹⁹ = 20131786943 is a prime.

It is a super-2 number, since 2×20132311231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20132311199 and 20132311208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20132311211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5643846 + ... + 5647411.

It is an arithmetic number, because the mean of its divisors is an integer number (5035901068).

Almost surely, 2^20132311231 is an apocalyptic number.

20132311231 is a deficient number, since it is larger than the sum of its proper divisors (11293041).

20132311231 is a wasteful number, since it uses less digits than its factorization.

20132311231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11293040.

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

Adding to 20132311231 its reverse (13211323102), we get a palindrome (33343634333).

The spelling of 20132311231 in words is "twenty billion, one hundred thirty-two million, three hundred eleven thousand, two hundred thirty-one".