20331212323 has 4 divisors (see below), whose sum is σ = 21032288640. Its totient is φ = 19630136008.

The previous prime is 20331212311. The next prime is 20331212347. The reversal of 20331212323 is 32321213302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20331212323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20331212294 and 20331212303.

It is not an unprimeable number, because it can be changed into a prime (20331212123) 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, 350538115 + ... + 350538172.

It is an arithmetic number, because the mean of its divisors is an integer number (5258072160).

Almost surely, 2^20331212323 is an apocalyptic number.

20331212323 is a deficient number, since it is larger than the sum of its proper divisors (701076317).

20331212323 is an equidigital number, since it uses as much as digits as its factorization.

20331212323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701076316.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 20331212323 its reverse (32321213302), we get a palindrome (52652425625).

The spelling of 20331212323 in words is "twenty billion, three hundred thirty-one million, two hundred twelve thousand, three hundred twenty-three".