20133311231 has 8 divisors (see below), whose sum is σ = 21979064064. Its totient is φ = 18290133720.

The previous prime is 20133311203. The next prime is 20133311299. The reversal of 20133311231 is 13211333102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20133311231 - 2¹⁰ = 20133310207 is a prime.

It is a super-2 number, since 2×20133311231² (a number of 21 digits) contains 22 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 (20133311431) 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 7 ways as a sum of consecutive naturals, for example, 627461 + ... + 658766.

It is an arithmetic number, because the mean of its divisors is an integer number (2747383008).

Almost surely, 2^20133311231 is an apocalyptic number.

20133311231 is a deficient number, since it is larger than the sum of its proper divisors (1845752833).

20133311231 is a wasteful number, since it uses less digits than its factorization.

20133311231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287661.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 20133311231 its reverse (13211333102), we get a palindrome (33344644333).

The spelling of 20133311231 in words is "twenty billion, one hundred thirty-three million, three hundred eleven thousand, two hundred thirty-one".