20045504 has 14 divisors (see below), whose sum is σ = 39777924. Its totient is φ = 10022720.

The previous prime is 20045497. The next prime is 20045507. The reversal of 20045504 is 40554002.

It is a happy number.

It is a super-2 number, since 2×20045504² = 803644461228032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20045507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156542 + ... + 156669.

Almost surely, 2^20045504 is an apocalyptic number.

It is an amenable number.

20045504 is a deficient number, since it is larger than the sum of its proper divisors (19732420).

20045504 is an equidigital number, since it uses as much as digits as its factorization.

20045504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313223 (or 313213 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 20045504 is about 4477.2205663782. The cubic root of 20045504 is about 271.6474671633.

Adding to 20045504 its reverse (40554002), we get a palindrome (60599506).

The spelling of 20045504 in words is "twenty million, forty-five thousand, five hundred four".