20768884 has 12 divisors (see below), whose sum is σ = 37518208. Its totient is φ = 10049400.

The previous prime is 20768873. The next prime is 20768887. The reversal of 20768884 is 48886702.

It is a self number, because there is not a number n which added to its sum of digits gives 20768884.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20768887) by changing a digit.

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, 83622 + ... + 83869.

Almost surely, 2^20768884 is an apocalyptic number.

It is an amenable number.

20768884 is a deficient number, since it is larger than the sum of its proper divisors (16749324).

20768884 is a wasteful number, since it uses less digits than its factorization.

20768884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167526 (or 167524 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 20768884 is about 4557.2891064755. The cubic root of 20768884 is about 274.8765682983.

The spelling of 20768884 in words is "twenty million, seven hundred sixty-eight thousand, eight hundred eighty-four".