20244820 has 12 divisors (see below), whose sum is σ = 42514164. Its totient is φ = 8097920.

The previous prime is 20244799. The next prime is 20244839. The reversal of 20244820 is 2844202.

It can be written as a sum of positive squares in 2 ways, for example, as 15100996 + 5143824 = 3886^2 + 2268^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20244791 and 20244800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 506101 + ... + 506140.

It is an arithmetic number, because the mean of its divisors is an integer number (3542847).

Almost surely, 2^20244820 is an apocalyptic number.

20244820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20244820 is an abundant number, since it is smaller than the sum of its proper divisors (22269344).

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

20244820 is a wasteful number, since it uses less digits than its factorization.

20244820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012250 (or 1012248 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 20244820 is about 4499.4244076326. The cubic root of 20244820 is about 272.5448457461.

The spelling of 20244820 in words is "twenty million, two hundred forty-four thousand, eight hundred twenty".