20244680 has 32 divisors (see below), whose sum is σ = 46302840. Its totient is φ = 7964160.

The previous prime is 20244673. The next prime is 20244683. The reversal of 20244680 is 8644202.

It can be written as a sum of positive squares in 4 ways, for example, as 16924996 + 3319684 = 4114^2 + 1822^2 .

It is not an unprimeable number, because it can be changed into a prime (20244683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1709 + ... + 6588.

Almost surely, 2^20244680 is an apocalyptic number.

20244680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20244680 is an abundant number, since it is smaller than the sum of its proper divisors (26058160).

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

20244680 is a wasteful number, since it uses less digits than its factorization.

20244680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8369 (or 8365 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 20244680 is about 4499.4088500602. The cubic root of 20244680 is about 272.5442174971.

Adding to 20244680 its reverse (8644202), we get a palindrome (28888882).

The spelling of 20244680 in words is "twenty million, two hundred forty-four thousand, six hundred eighty".