20244220 has 24 divisors (see below), whose sum is σ = 42614208. Its totient is φ = 8078400.

The previous prime is 20244199. The next prime is 20244239. The reversal of 20244220 is 2244202.

It is a junction number, because it is equal to n+sod(n) for n = 20244194 and 20244203.

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, 9885 + ... + 11755.

It is an arithmetic number, because the mean of its divisors is an integer number (1775592).

It is a self-describing number.

Almost surely, 2^20244220 is an apocalyptic number.

20244220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20244220 is an abundant number, since it is smaller than the sum of its proper divisors (22369988).

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

20244220 is a wasteful number, since it uses less digits than its factorization.

20244220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2421 (or 2419 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 20244220 is about 4499.3577319435. The cubic root of 20244220 is about 272.5421532298.

Adding to 20244220 its reverse (2244202), we get a palindrome (22488422).

The spelling of 20244220 in words is "twenty million, two hundred forty-four thousand, two hundred twenty".