42423123433 has 4 divisors (see below), whose sum is σ = 44918601300. Its totient is φ = 39927645568.

The previous prime is 42423123397. The next prime is 42423123439. The reversal of 42423123433 is 33432132424.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24369707664 + 18053415769 = 156108^2 + 134363^2 .

It is a cyclic number.

It is not a de Polignac number, because 42423123433 - 2²⁹ = 41886252521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42423123395 and 42423123404.

It is not an unprimeable number, because it can be changed into a prime (42423123439) 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, 1247738908 + ... + 1247738941.

It is an arithmetic number, because the mean of its divisors is an integer number (11229650325).

Almost surely, 2^42423123433 is an apocalyptic number.

It is an amenable number.

42423123433 is a deficient number, since it is larger than the sum of its proper divisors (2495477867).

42423123433 is a wasteful number, since it uses less digits than its factorization.

42423123433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2495477866.

The product of its digits is 41472, while the sum is 31.

Adding to 42423123433 its reverse (33432132424), we get a palindrome (75855255857).

The spelling of 42423123433 in words is "forty-two billion, four hundred twenty-three million, one hundred twenty-three thousand, four hundred thirty-three".