20045585 has 16 divisors (see below), whose sum is σ = 27572736. Its totient is φ = 13704768.

The previous prime is 20045573. The next prime is 20045591. The reversal of 20045585 is 58554002.

It is not a de Polignac number, because 20045585 - 2⁶ = 20045521 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 15587 + ... + 16823.

It is an arithmetic number, because the mean of its divisors is an integer number (1723296).

Almost surely, 2^20045585 is an apocalyptic number.

It is an amenable number.

20045585 is a deficient number, since it is larger than the sum of its proper divisors (7527151).

20045585 is a wasteful number, since it uses less digits than its factorization.

20045585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712.

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 20045585 is about 4477.2296121597. The cubic root of 20045585 is about 271.6478330544.

Adding to 20045585 its reverse (58554002), we get a palindrome (78599587).

The spelling of 20045585 in words is "twenty million, forty-five thousand, five hundred eighty-five".