20123120333 has 4 divisors (see below), whose sum is σ = 20613928188. Its totient is φ = 19632312480.

The previous prime is 20123120323. The next prime is 20123120357. The reversal of 20123120333 is 33302132102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33302132102 = 2 ⋅16651066051.

It can be written as a sum of positive squares in 2 ways, for example, as 3799736164 + 16323384169 = 61642^2 + 127763^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20123120333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123120323) 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, 245403866 + ... + 245403947.

It is an arithmetic number, because the mean of its divisors is an integer number (5153482047).

Almost surely, 2^20123120333 is an apocalyptic number.

It is an amenable number.

20123120333 is a deficient number, since it is larger than the sum of its proper divisors (490807855).

20123120333 is an equidigital number, since it uses as much as digits as its factorization.

20123120333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490807854.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 20123120333 its reverse (33302132102), we get a palindrome (53425252435).

The spelling of 20123120333 in words is "twenty billion, one hundred twenty-three million, one hundred twenty thousand, three hundred thirty-three".