20800844 has 6 divisors (see below), whose sum is σ = 36401484. Its totient is φ = 10400420.

The previous prime is 20800841. The next prime is 20800853. The reversal of 20800844 is 44800802.

It is a super-2 number, since 2×20800844² = 865350222224672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20800841) by changing a digit.

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 as a sum of consecutive naturals, namely, 2600102 + ... + 2600109.

It is an arithmetic number, because the mean of its divisors is an integer number (6066914).

Almost surely, 2^20800844 is an apocalyptic number.

It is an amenable number.

20800844 is a deficient number, since it is larger than the sum of its proper divisors (15600640).

20800844 is a wasteful number, since it uses less digits than its factorization.

20800844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5200215 (or 5200213 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 20800844 is about 4560.7942290790. The cubic root of 20800844 is about 275.0174931021.

The spelling of 20800844 in words is "twenty million, eight hundred thousand, eight hundred forty-four".