20340142323 has 4 divisors (see below), whose sum is σ = 27120189768. Its totient is φ = 13560094880.

The previous prime is 20340142289. The next prime is 20340142331. The reversal of 20340142323 is 32324104302.

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 20340142323 - 2¹⁰ = 20340141299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20340142293 and 20340142302.

It is not an unprimeable number, because it can be changed into a prime (20340142373) 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, 3390023718 + ... + 3390023723.

It is an arithmetic number, because the mean of its divisors is an integer number (6780047442).

Almost surely, 2^20340142323 is an apocalyptic number.

20340142323 is a deficient number, since it is larger than the sum of its proper divisors (6780047445).

20340142323 is an equidigital number, since it uses as much as digits as its factorization.

20340142323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6780047444.

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 20340142323 its reverse (32324104302), we get a palindrome (52664246625).

The spelling of 20340142323 in words is "twenty billion, three hundred forty million, one hundred forty-two thousand, three hundred twenty-three".