20680180 has 12 divisors (see below), whose sum is σ = 43428420. Its totient is φ = 8272064.

The previous prime is 20680139. The next prime is 20680181. The reversal of 20680180 is 8108602.

It can be written as a sum of positive squares in 2 ways, for example, as 12873744 + 7806436 = 3588^2 + 2794^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20680181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 516985 + ... + 517024.

It is an arithmetic number, because the mean of its divisors is an integer number (3619035).

Almost surely, 2^20680180 is an apocalyptic number.

20680180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20680180 is an abundant number, since it is smaller than the sum of its proper divisors (22748240).

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

20680180 is a wasteful number, since it uses less digits than its factorization.

20680180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034018 (or 1034016 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 20680180 is about 4547.5465912951. The cubic root of 20680180 is about 274.4846768111.

Adding to 20680180 its reverse (8108602), we get a palindrome (28788782).

The spelling of 20680180 in words is "twenty million, six hundred eighty thousand, one hundred eighty".