20312043233 has 4 divisors (see below), whose sum is σ = 21381098160. Its totient is φ = 19242988308.

The previous prime is 20312043229. The next prime is 20312043259. The reversal of 20312043233 is 33234021302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20312043233 - 2² = 20312043229 is a prime.

It is a super-2 number, since 2×20312043233² (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 = 20312043199 and 20312043208.

It is not an unprimeable number, because it can be changed into a prime (20312043833) 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, 534527435 + ... + 534527472.

It is an arithmetic number, because the mean of its divisors is an integer number (5345274540).

Almost surely, 2^20312043233 is an apocalyptic number.

It is an amenable number.

20312043233 is a deficient number, since it is larger than the sum of its proper divisors (1069054927).

20312043233 is a wasteful number, since it uses less digits than its factorization.

20312043233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069054926.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 20312043233 its reverse (33234021302), we get a palindrome (53546064535).

The spelling of 20312043233 in words is "twenty billion, three hundred twelve million, forty-three thousand, two hundred thirty-three".