20312330233 has 16 divisors (see below), whose sum is σ = 22371793920. Its totient is φ = 18324991296.

The previous prime is 20312330219. The next prime is 20312330257. The reversal of 20312330233 is 33203321302.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20312330233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20312330033) 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, 416191 + ... + 462427.

It is an arithmetic number, because the mean of its divisors is an integer number (1398237120).

Almost surely, 2^20312330233 is an apocalyptic number.

It is an amenable number.

20312330233 is a deficient number, since it is larger than the sum of its proper divisors (2059463687).

20312330233 is a wasteful number, since it uses less digits than its factorization.

20312330233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47016.

The product of its (nonzero) digits is 1944, while the sum is 22.

Adding to 20312330233 its reverse (33203321302), we get a palindrome (53515651535).

The spelling of 20312330233 in words is "twenty billion, three hundred twelve million, three hundred thirty thousand, two hundred thirty-three".