20044890 has 48 divisors (see below), whose sum is σ = 52367328. Its totient is φ = 5319648.

The previous prime is 20044873. The next prime is 20044897. The reversal of 20044890 is 9844002.

It is a super-2 number, since 2×20044890² = 803595230224200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20044897) 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 in 23 ways as a sum of consecutive naturals, for example, 25077 + ... + 25863.

It is an arithmetic number, because the mean of its divisors is an integer number (1090986).

Almost surely, 2^20044890 is an apocalyptic number.

20044890 is an abundant number, since it is smaller than the sum of its proper divisors (32322438).

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

20044890 is a wasteful number, since it uses less digits than its factorization.

20044890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083 (or 1080 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 20044890 is about 4477.1519965264. The cubic root of 20044890 is about 271.6446935862.

Adding to 20044890 its reverse (9844002), we get a palindrome (29888892).

The spelling of 20044890 in words is "twenty million, forty-four thousand, eight hundred ninety".