20045884 has 12 divisors (see below), whose sum is σ = 35936208. Its totient is φ = 9778400.

The previous prime is 20045849. The next prime is 20045887. The reversal of 20045884 is 48854002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60952 + ... + 61279.

It is an arithmetic number, because the mean of its divisors is an integer number (2994684).

Almost surely, 2^20045884 is an apocalyptic number.

It is an amenable number.

20045884 is a deficient number, since it is larger than the sum of its proper divisors (15890324).

20045884 is a wasteful number, since it uses less digits than its factorization.

20045884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122276 (or 122274 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 31.

The square root of 20045884 is about 4477.2630032197. The cubic root of 20045884 is about 271.6491836809.

Adding to 20045884 its reverse (48854002), we get a palindrome (68899886).

The spelling of 20045884 in words is "twenty million, forty-five thousand, eight hundred eighty-four".