20016884 has 6 divisors (see below), whose sum is σ = 35029554. Its totient is φ = 10008440.

The previous prime is 20016883. The next prime is 20016907. The reversal of 20016884 is 48861002.

It can be written as a sum of positive squares in only one way, i.e., 19114384 + 902500 = 4372^2 + 950^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20016883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2502107 + ... + 2502114.

It is an arithmetic number, because the mean of its divisors is an integer number (5838259).

Almost surely, 2^20016884 is an apocalyptic number.

It is an amenable number.

20016884 is a deficient number, since it is larger than the sum of its proper divisors (15012670).

20016884 is a wasteful number, since it uses less digits than its factorization.

20016884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5004225 (or 5004223 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 20016884 is about 4474.0232453576. The cubic root of 20016884 is about 271.5181238869.

Adding to 20016884 its reverse (48861002), we get a palindrome (68877886).

The spelling of 20016884 in words is "twenty million, sixteen thousand, eight hundred eighty-four".