42240043423 has 4 divisors (see below), whose sum is σ = 42242176368. Its totient is φ = 42237910480.

The previous prime is 42240043411. The next prime is 42240043441. The reversal of 42240043423 is 32434004224.

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 42240043423 - 2³³ = 33650108831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42240043391 and 42240043400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42240043723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1036486 + ... + 1076467.

It is an arithmetic number, because the mean of its divisors is an integer number (10560544092).

Almost surely, 2^42240043423 is an apocalyptic number.

42240043423 is a deficient number, since it is larger than the sum of its proper divisors (2132945).

42240043423 is a wasteful number, since it uses less digits than its factorization.

42240043423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132944.

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 42240043423 its reverse (32434004224), we get a palindrome (74674047647).

The spelling of 42240043423 in words is "forty-two billion, two hundred forty million, forty-three thousand, four hundred twenty-three".