20628844 has 12 divisors (see below), whose sum is σ = 36151864. Its totient is φ = 10299744.

The previous prime is 20628823. The next prime is 20628859. The reversal of 20628844 is 44882602.

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, 129 + ... + 6424.

Almost surely, 2^20628844 is an apocalyptic number.

It is an amenable number.

20628844 is a deficient number, since it is larger than the sum of its proper divisors (15523020).

20628844 is a wasteful number, since it uses less digits than its factorization.

20628844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7344 (or 7342 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 34.

The square root of 20628844 is about 4541.8987219003. The cubic root of 20628844 is about 274.2573638129.

The spelling of 20628844 in words is "twenty million, six hundred twenty-eight thousand, eight hundred forty-four".