42020335847881 has 4 divisors (see below), whose sum is σ = 42020888815764. Its totient is φ = 42019782880000.

The previous prime is 42020335847801. The next prime is 42020335847891. The reversal of 42020335847881 is 18874853302024.

42020335847881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27945390595600 + 14074945252281 = 5286340^2 + 3751659^2 .

It is a cyclic number.

It is not a de Polignac number, because 42020335847881 - 2¹¹ = 42020335845833 is a prime.

It is a super-2 number, since 2×42020335847881² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42020335847801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276369940 + ... + 276521941.

It is an arithmetic number, because the mean of its divisors is an integer number (10505222203941).

Almost surely, 2^{42020335847881} is an apocalyptic number.

It is an amenable number.

42020335847881 is a deficient number, since it is larger than the sum of its proper divisors (552967883).

42020335847881 is an equidigital number, since it uses as much as digits as its factorization.

42020335847881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552967882.

The product of its (nonzero) digits is 10321920, while the sum is 55.

The spelling of 42020335847881 in words is "forty-two trillion, twenty billion, three hundred thirty-five million, eight hundred forty-seven thousand, eight hundred eighty-one".