42021866041 has 8 divisors (see below), whose sum is σ = 45333246024. Its totient is φ = 38803764480.

The previous prime is 42021866023. The next prime is 42021866071. The reversal of 42021866041 is 14066812024.

It can be written as a sum of positive squares in 4 ways, for example, as 10947227641 + 31074638400 = 104629^2 + 176280^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42021866041 - 2⁵ = 42021866009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42021865988 and 42021866006.

It is not an unprimeable number, because it can be changed into a prime (42021866071) 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 7 ways as a sum of consecutive naturals, for example, 23318670 + ... + 23320471.

It is an arithmetic number, because the mean of its divisors is an integer number (5666655753).

Almost surely, 2^42021866041 is an apocalyptic number.

It is an amenable number.

42021866041 is a deficient number, since it is larger than the sum of its proper divisors (3311379983).

42021866041 is a wasteful number, since it uses less digits than its factorization.

42021866041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46639211.

The product of its (nonzero) digits is 18432, while the sum is 34.

The spelling of 42021866041 in words is "forty-two billion, twenty-one million, eight hundred sixty-six thousand, forty-one".