20231013133 has 4 divisors (see below), whose sum is σ = 20562669148. Its totient is φ = 19899357120.

The previous prime is 20231013091. The next prime is 20231013167. The reversal of 20231013133 is 33131013202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4233063844 + 15997949289 = 65062^2 + 126483^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20231013133 is a prime.

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 20231013133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20231013833) 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, 165827916 + ... + 165828037.

It is an arithmetic number, because the mean of its divisors is an integer number (5140667287).

Almost surely, 2^20231013133 is an apocalyptic number.

It is an amenable number.

20231013133 is a deficient number, since it is larger than the sum of its proper divisors (331656015).

20231013133 is an equidigital number, since it uses as much as digits as its factorization.

20231013133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331656014.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 20231013133 its reverse (33131013202), we get a palindrome (53362026335).

The spelling of 20231013133 in words is "twenty billion, two hundred thirty-one million, thirteen thousand, one hundred thirty-three".