442820829021 has 4 divisors (see below), whose sum is σ = 590427772032. Its totient is φ = 295213886012.

The previous prime is 442820829019. The next prime is 442820829023. The reversal of 442820829021 is 120928028244.

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 an interprime number because it is at equal distance from previous prime (442820829019) and next prime (442820829023).

It is a cyclic number.

It is not a de Polignac number, because 442820829021 - 2¹ = 442820829019 is a prime.

It is a super-2 number, since 2×442820829021² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442820829023) 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, 73803471501 + ... + 73803471506.

It is an arithmetic number, because the mean of its divisors is an integer number (147606943008).

Almost surely, 2^442820829021 is an apocalyptic number.

It is an amenable number.

442820829021 is a deficient number, since it is larger than the sum of its proper divisors (147606943011).

442820829021 is a wasteful number, since it uses less digits than its factorization.

442820829021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147606943010.

The product of its (nonzero) digits is 147456, while the sum is 42.

The spelling of 442820829021 in words is "four hundred forty-two billion, eight hundred twenty million, eight hundred twenty-nine thousand, twenty-one".