20820444 has 24 divisors (see below), whose sum is σ = 51439248. Its totient is φ = 6531840.

The previous prime is 20820431. The next prime is 20820469. The reversal of 20820444 is 44402802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50827 + ... + 51234.

It is an arithmetic number, because the mean of its divisors is an integer number (2143302).

Almost surely, 2^20820444 is an apocalyptic number.

It is an amenable number.

20820444 is an abundant number, since it is smaller than the sum of its proper divisors (30618804).

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

20820444 is a wasteful number, since it uses less digits than its factorization.

20820444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102085 (or 102083 counting only the distinct ones).

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

The square root of 20820444 is about 4562.9424716952. The cubic root of 20820444 is about 275.1038461799.

The spelling of 20820444 in words is "twenty million, eight hundred twenty thousand, four hundred forty-four".