20045635 has 16 divisors (see below), whose sum is σ = 25707456. Its totient is φ = 14952448.

The previous prime is 20045629. The next prime is 20045651. The reversal of 20045635 is 53654002.

It is a cyclic number.

It is not a de Polignac number, because 20045635 - 2⁷ = 20045507 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8562 + ... + 10648.

It is an arithmetic number, because the mean of its divisors is an integer number (1606716).

Almost surely, 2^20045635 is an apocalyptic number.

20045635 is a deficient number, since it is larger than the sum of its proper divisors (5661821).

20045635 is a wasteful number, since it uses less digits than its factorization.

20045635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2222.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 20045635 is about 4477.2351959664. The cubic root of 20045635 is about 271.6480589126.

Adding to 20045635 its reverse (53654002), we get a palindrome (73699637).

The spelling of 20045635 in words is "twenty million, forty-five thousand, six hundred thirty-five".