42323430021 has 32 divisors (see below), whose sum is σ = 58076860800. Its totient is φ = 27399582720.

The previous prime is 42323429983. The next prime is 42323430029. The reversal of 42323430021 is 12003432324.

It is not a de Polignac number, because 42323430021 - 2³¹ = 40175946373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42323429973 and 42323430000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42323430029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39591075 + ... + 39592143.

It is an arithmetic number, because the mean of its divisors is an integer number (1814901900).

Almost surely, 2^42323430021 is an apocalyptic number.

42323430021 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

42323430021 is a deficient number, since it is larger than the sum of its proper divisors (15753430779).

42323430021 is a wasteful number, since it uses less digits than its factorization.

42323430021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2309.

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

Adding to 42323430021 its reverse (12003432324), we get a palindrome (54326862345).

The spelling of 42323430021 in words is "forty-two billion, three hundred twenty-three million, four hundred thirty thousand, twenty-one".