2120434423 has 4 divisors (see below), whose sum is σ = 2212627248. Its totient is φ = 2028241600.

The previous prime is 2120434417. The next prime is 2120434427. The reversal of 2120434423 is 3244340212.

It is a happy number.

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 2120434423 - 2²¹ = 2118337271 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 (2120434427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46096378 + ... + 46096423.

It is an arithmetic number, because the mean of its divisors is an integer number (553156812).

Almost surely, 2^2120434423 is an apocalyptic number.

2120434423 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2120434423 is a deficient number, since it is larger than the sum of its proper divisors (92192825).

2120434423 is an equidigital number, since it uses as much as digits as its factorization.

2120434423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92192824.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 2120434423 is about 46048.1750235555. The cubic root of 2120434423 is about 1284.7193991313.

Adding to 2120434423 its reverse (3244340212), we get a palindrome (5364774635).

The spelling of 2120434423 in words is "two billion, one hundred twenty million, four hundred thirty-four thousand, four hundred twenty-three".