824020420821 has 32 divisors (see below), whose sum is σ = 1189130544000. Its totient is φ = 504554427648.

The previous prime is 824020420799. The next prime is 824020420877. The reversal of 824020420821 is 128024020428.

It is not a de Polignac number, because 824020420821 - 2⁹ = 824020420309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (824020420921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14430795 + ... + 14487783.

It is an arithmetic number, because the mean of its divisors is an integer number (37160329500).

Almost surely, 2^824020420821 is an apocalyptic number.

It is an amenable number.

824020420821 is a deficient number, since it is larger than the sum of its proper divisors (365110123179).

824020420821 is a wasteful number, since it uses less digits than its factorization.

824020420821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58853.

The product of its (nonzero) digits is 16384, while the sum is 33.

The spelling of 824020420821 in words is "eight hundred twenty-four billion, twenty million, four hundred twenty thousand, eight hundred twenty-one".