42021866042 has 32 divisors (see below), whose sum is σ = 72560517120. Its totient is φ = 18098974080.

The previous prime is 42021866023. The next prime is 42021866071. The reversal of 42021866042 is 24066812024.

It is a junction number, because it is equal to n+sod(n) for n = 42021865993 and 42021866011.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 832442 + ... + 881477.

It is an arithmetic number, because the mean of its divisors is an integer number (2267516160).

Almost surely, 2^42021866042 is an apocalyptic number.

42021866042 is a deficient number, since it is larger than the sum of its proper divisors (30538651078).

42021866042 is a wasteful number, since it uses less digits than its factorization.

42021866042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713998.

The product of its (nonzero) digits is 36864, while the sum is 35.

The spelling of 42021866042 in words is "forty-two billion, twenty-one million, eight hundred sixty-six thousand, forty-two".