42021866039 has 8 divisors (see below), whose sum is σ = 42088278912. Its totient is φ = 41955507000.

The previous prime is 42021866023. The next prime is 42021866071. The reversal of 42021866039 is 93066812024.

42021866039 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42021866039 - 2⁴ = 42021866023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42021865987 and 42021866005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42021866009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1720664 + ... + 1744914.

It is an arithmetic number, because the mean of its divisors is an integer number (5261034864).

Almost surely, 2^42021866039 is an apocalyptic number.

42021866039 is a deficient number, since it is larger than the sum of its proper divisors (66412873).

42021866039 is a wasteful number, since it uses less digits than its factorization.

42021866039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26917.

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 42021866039 in words is "forty-two billion, twenty-one million, eight hundred sixty-six thousand, thirty-nine".