42844027821 has 16 divisors (see below), whose sum is σ = 65453980800. Its totient is φ = 24419360448.

The previous prime is 42844027687. The next prime is 42844027841. The reversal of 42844027821 is 12872044824.

It is not a de Polignac number, because 42844027821 - 2¹⁵ = 42843995053 is a prime.

It is a super-2 number, since 2×42844027821² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42844027841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2614186 + ... + 2630523.

It is an arithmetic number, because the mean of its divisors is an integer number (4090873800).

Almost surely, 2^42844027821 is an apocalyptic number.

It is an amenable number.

42844027821 is a deficient number, since it is larger than the sum of its proper divisors (22609952979).

42844027821 is a wasteful number, since it uses less digits than its factorization.

42844027821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5245108.

The product of its (nonzero) digits is 229376, while the sum is 42.

The spelling of 42844027821 in words is "forty-two billion, eight hundred forty-four million, twenty-seven thousand, eight hundred twenty-one".