20844042 has 16 divisors (see below), whose sum is σ = 41733120. Its totient is φ = 6940512.

The previous prime is 20844041. The next prime is 20844053. The reversal of 20844042 is 24044802.

It is not an unprimeable number, because it can be changed into a prime (20844041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8934 + ... + 11022.

It is an arithmetic number, because the mean of its divisors is an integer number (2608320).

Almost surely, 2^20844042 is an apocalyptic number.

20844042 is an abundant number, since it is smaller than the sum of its proper divisors (20889078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20844042 is a wasteful number, since it uses less digits than its factorization.

20844042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3757.

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 20844042 is about 4565.5275708290. The cubic root of 20844042 is about 275.2077416500.

Adding to 20844042 its reverse (24044802), we get a palindrome (44888844).

The spelling of 20844042 in words is "twenty million, eight hundred forty-four thousand, forty-two".