2123243423 has 4 divisors (see below), whose sum is σ = 2426563920. Its totient is φ = 1819922928.

The previous prime is 2123243389. The next prime is 2123243431. The reversal of 2123243423 is 3243423212.

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 2123243423 - 2¹⁰ = 2123242399 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123243392 and 2123243401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123249423) 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, 151660238 + ... + 151660251.

It is an arithmetic number, because the mean of its divisors is an integer number (606640980).

Almost surely, 2^2123243423 is an apocalyptic number.

2123243423 is a deficient number, since it is larger than the sum of its proper divisors (303320497).

2123243423 is an equidigital number, since it uses as much as digits as its factorization.

2123243423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303320496.

The product of its digits is 6912, while the sum is 26.

The square root of 2123243423 is about 46078.6655948282. The cubic root of 2123243423 is about 1285.2864502938.

Adding to 2123243423 its reverse (3243423212), we get a palindrome (5366666635).

The spelling of 2123243423 in words is "two billion, one hundred twenty-three million, two hundred forty-three thousand, four hundred twenty-three".