20444550 has 48 divisors (see below), whose sum is σ = 57948672. Its totient is φ = 4672800.

The previous prime is 20444519. The next prime is 20444569. The reversal of 20444550 is 5544402.

It is a self number, because there is not a number n which added to its sum of digits gives 20444550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8686 + ... + 10785.

It is an arithmetic number, because the mean of its divisors is an integer number (1207264).

Almost surely, 2^20444550 is an apocalyptic number.

20444550 is an abundant number, since it is smaller than the sum of its proper divisors (37504122).

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

20444550 is a wasteful number, since it uses less digits than its factorization.

20444550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19493 (or 19488 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 20444550 is about 4521.5649945566. The cubic root of 20444550 is about 273.4381992363.

Adding to 20444550 its reverse (5544402), we get a palindrome (25988952).

The spelling of 20444550 in words is "twenty million, four hundred forty-four thousand, five hundred fifty".