20323312133 has 16 divisors (see below), whose sum is σ = 22668361920. Its totient is φ = 18107502336.

The previous prime is 20323312129. The next prime is 20323312169. The reversal of 20323312133 is 33121332302.

It is a cyclic number.

It is not a de Polignac number, because 20323312133 - 2² = 20323312129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20323312099 and 20323312108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323312733) 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, 420566 + ... + 466392.

It is an arithmetic number, because the mean of its divisors is an integer number (1416772620).

Almost surely, 2^20323312133 is an apocalyptic number.

It is an amenable number.

20323312133 is a deficient number, since it is larger than the sum of its proper divisors (2345049787).

20323312133 is a wasteful number, since it uses less digits than its factorization.

20323312133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47236.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 20323312133 its reverse (33121332302), we get a palindrome (53444644435).

The spelling of 20323312133 in words is "twenty billion, three hundred twenty-three million, three hundred twelve thousand, one hundred thirty-three".