20202042323 has 4 divisors (see below), whose sum is σ = 20544449880. Its totient is φ = 19859634768.

The previous prime is 20202042317. The next prime is 20202042337. The reversal of 20202042323 is 32324020202.

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 20202042323 - 2⁴ = 20202042307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20202042295 and 20202042304.

It is not an unprimeable number, because it can be changed into a prime (20202042313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171203690 + ... + 171203807.

It is an arithmetic number, because the mean of its divisors is an integer number (5136112470).

Almost surely, 2^20202042323 is an apocalyptic number.

20202042323 is a deficient number, since it is larger than the sum of its proper divisors (342407557).

20202042323 is an equidigital number, since it uses as much as digits as its factorization.

20202042323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342407556.

The product of its (nonzero) digits is 1152, while the sum is 20.

Adding to 20202042323 its reverse (32324020202), we get a palindrome (52526062525).

The spelling of 20202042323 in words is "twenty billion, two hundred two million, forty-two thousand, three hundred twenty-three".