42042836893 has 8 divisors (see below), whose sum is σ = 43278867128. Its totient is φ = 40812056064.

The previous prime is 42042836887. The next prime is 42042836897. The reversal of 42042836893 is 39863824024.

It can be written as a sum of positive squares in 4 ways, for example, as 7733795364 + 34309041529 = 87942^2 + 185227^2 .

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 42042836893 - 2¹³ = 42042828701 is a prime.

It is a super-2 number, since 2×42042836893² (a number of 22 digits) contains 22 as substring.

It is the 205044-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42042836897) by changing a digit.

It is a nontrivial repunit in base 205043.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1296096 + ... + 1328137.

It is an arithmetic number, because the mean of its divisors is an integer number (5409858391).

Almost surely, 2^42042836893 is an apocalyptic number.

It is an amenable number.

42042836893 is a deficient number, since it is larger than the sum of its proper divisors (1236030235).

42042836893 is a wasteful number, since it uses less digits than its factorization.

42042836893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2624703.

The product of its (nonzero) digits is 1990656, while the sum is 49.

The spelling of 42042836893 in words is "forty-two billion, forty-two million, eight hundred thirty-six thousand, eight hundred ninety-three".