20449330585 has 4 divisors (see below), whose sum is σ = 24539196708. Its totient is φ = 16359464464.

The previous prime is 20449330529. The next prime is 20449330589. The reversal of 20449330585 is 58503394402.

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 6292138329 + 14157192256 = 79323^2 + 118984^2 .

It is a cyclic number.

It is not a de Polignac number, because 20449330585 - 2⁷ = 20449330457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20449330589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2044933054 + ... + 2044933063.

It is an arithmetic number, because the mean of its divisors is an integer number (6134799177).

Almost surely, 2^20449330585 is an apocalyptic number.

It is an amenable number.

20449330585 is a deficient number, since it is larger than the sum of its proper divisors (4089866123).

20449330585 is an equidigital number, since it uses as much as digits as its factorization.

20449330585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4089866122.

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 20449330585 in words is "twenty billion, four hundred forty-nine million, three hundred thirty thousand, five hundred eighty-five".