20884144 has 20 divisors (see below), whose sum is σ = 40678696. Its totient is φ = 10386432.

The previous prime is 20884139. The next prime is 20884163. The reversal of 20884144 is 44148802.

It is a super-2 number, since 2×20884144² = 872294941225472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294 + ... + 6469.

Almost surely, 2^20884144 is an apocalyptic number.

It is an amenable number.

20884144 is a deficient number, since it is larger than the sum of its proper divisors (19794552).

20884144 is a wasteful number, since it uses less digits than its factorization.

20884144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6964 (or 6958 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 31.

The square root of 20884144 is about 4569.9172859035. The cubic root of 20884144 is about 275.3841199608.

The spelling of 20884144 in words is "twenty million, eight hundred eighty-four thousand, one hundred forty-four".