20133311243 has 4 divisors (see below), whose sum is σ = 20782772928. Its totient is φ = 19483849560.

The previous prime is 20133311203. The next prime is 20133311299. The reversal of 20133311243 is 34211333102.

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 20133311243 - 2¹⁴ = 20133294859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20133311203) 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, 324730796 + ... + 324730857.

It is an arithmetic number, because the mean of its divisors is an integer number (5195693232).

Almost surely, 2^20133311243 is an apocalyptic number.

20133311243 is a deficient number, since it is larger than the sum of its proper divisors (649461685).

20133311243 is an equidigital number, since it uses as much as digits as its factorization.

20133311243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649461684.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 20133311243 its reverse (34211333102), we get a palindrome (54344644345).

The spelling of 20133311243 in words is "twenty billion, one hundred thirty-three million, three hundred eleven thousand, two hundred forty-three".