20844668 has 12 divisors (see below), whose sum is σ = 39284280. Its totient is φ = 9620592.

The previous prime is 20844667. The next prime is 20844671. The reversal of 20844668 is 86644802.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20844661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200378 + ... + 200481.

It is an arithmetic number, because the mean of its divisors is an integer number (3273690).

Almost surely, 2^20844668 is an apocalyptic number.

It is an amenable number.

20844668 is a deficient number, since it is larger than the sum of its proper divisors (18439612).

20844668 is a wasteful number, since it uses less digits than its factorization.

20844668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400876 (or 400874 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 20844668 is about 4565.5961275610. The cubic root of 20844668 is about 275.2104966870.

It can be divided in two parts, 20844 and 668, that added together give a palindrome (21512).

The spelling of 20844668 in words is "twenty million, eight hundred forty-four thousand, six hundred sixty-eight".