20872844 has 6 divisors (see below), whose sum is σ = 36527484. Its totient is φ = 10436420.

The previous prime is 20872807. The next prime is 20872853. The reversal of 20872844 is 44827802.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2609102 + ... + 2609109.

It is an arithmetic number, because the mean of its divisors is an integer number (6087914).

Almost surely, 2^20872844 is an apocalyptic number.

It is an amenable number.

20872844 is a deficient number, since it is larger than the sum of its proper divisors (15654640).

20872844 is a wasteful number, since it uses less digits than its factorization.

20872844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5218215 (or 5218213 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 20872844 is about 4568.6807723893. The cubic root of 20872844 is about 275.3344426877.

The spelling of 20872844 in words is "twenty million, eight hundred seventy-two thousand, eight hundred forty-four".