842282367821 has 4 divisors (see below), whose sum is σ = 860203269312. Its totient is φ = 824361466332.

The previous prime is 842282367739. The next prime is 842282367833. The reversal of 842282367821 is 128763282248.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 842282367821 - 2¹⁰ = 842282366797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842282367881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8960450675 + ... + 8960450768.

It is an arithmetic number, because the mean of its divisors is an integer number (215050817328).

Almost surely, 2^842282367821 is an apocalyptic number.

It is an amenable number.

842282367821 is a deficient number, since it is larger than the sum of its proper divisors (17920901491).

842282367821 is a wasteful number, since it uses less digits than its factorization.

842282367821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17920901490.

The product of its digits is 4128768, while the sum is 53.

The spelling of 842282367821 in words is "eight hundred forty-two billion, two hundred eighty-two million, three hundred sixty-seven thousand, eight hundred twenty-one".