4494831821 has 4 divisors (see below), whose sum is σ = 4503840000. Its totient is φ = 4485823644.

The previous prime is 4494831799. The next prime is 4494831863. The reversal of 4494831821 is 1281384944.

4494831821 is digitally balanced in base 3, 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, 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 4494831821 - 2¹⁰ = 4494830797 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 (4494831871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4503341 + ... + 4504338.

It is an arithmetic number, because the mean of its divisors is an integer number (1125960000).

Almost surely, 2^4494831821 is an apocalyptic number.

It is an amenable number.

4494831821 is a deficient number, since it is larger than the sum of its proper divisors (9008179).

4494831821 is an equidigital number, since it uses as much as digits as its factorization.

4494831821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9008178.

The product of its digits is 221184, while the sum is 44.

The square root of 4494831821 is about 67043.5069264728. The cubic root of 4494831821 is about 1650.3313471073.

The spelling of 4494831821 in words is "four billion, four hundred ninety-four million, eight hundred thirty-one thousand, eight hundred twenty-one".