20444000 has 96 divisors (see below), whose sum is σ = 53071200. Its totient is φ = 7718400.

The previous prime is 20443999. The next prime is 20444009. The reversal of 20444000 is 44402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20444009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75866 + ... + 76134.

It is an arithmetic number, because the mean of its divisors is an integer number (552825).

Almost surely, 2^20444000 is an apocalyptic number.

20444000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20444000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26535600).

20444000 is an abundant number, since it is smaller than the sum of its proper divisors (32627200).

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

20444000 is a wasteful number, since it uses less digits than its factorization.

20444000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 20444000 is about 4521.5041744977. The cubic root of 20444000 is about 273.4357471996.

Adding to 20444000 its reverse (44402), we get a palindrome (20488402).

The spelling of 20444000 in words is "twenty million, four hundred forty-four thousand".