20045535 has 32 divisors (see below), whose sum is σ = 33868800. Its totient is φ = 10103808.

The previous prime is 20045521. The next prime is 20045537. The reversal of 20045535 is 53554002.

It is not a de Polignac number, because 20045535 - 2⁶ = 20045471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045537) 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 31 ways as a sum of consecutive naturals, for example, 33166 + ... + 33764.

It is an arithmetic number, because the mean of its divisors is an integer number (1058400).

Almost surely, 2^20045535 is an apocalyptic number.

20045535 is a deficient number, since it is larger than the sum of its proper divisors (13823265).

20045535 is a wasteful number, since it uses less digits than its factorization.

20045535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727.

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 20045535 is about 4477.2240283461. The cubic root of 20045535 is about 271.6476071958.

Adding to 20045535 its reverse (53554002), we get a palindrome (73599537).

The spelling of 20045535 in words is "twenty million, forty-five thousand, five hundred thirty-five".