20844028 has 24 divisors (see below), whose sum is σ = 38029824. Its totient is φ = 9985200.

The previous prime is 20844017. The next prime is 20844029. The reversal of 20844028 is 82044802.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20843987 and 20844005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20844029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12483 + ... + 14053.

It is an arithmetic number, because the mean of its divisors is an integer number (1584576).

Almost surely, 2^20844028 is an apocalyptic number.

It is an amenable number.

20844028 is a deficient number, since it is larger than the sum of its proper divisors (17185796).

20844028 is a wasteful number, since it uses less digits than its factorization.

20844028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713 (or 1711 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 20844028 is about 4565.5260375996. The cubic root of 20844028 is about 275.2076800351.

The spelling of 20844028 in words is "twenty million, eight hundred forty-four thousand, twenty-eight".