20546180 has 36 divisors (see below), whose sum is σ = 44625420. Its totient is φ = 7945920.

The previous prime is 20546161. The next prime is 20546189. The reversal of 20546180 is 8164502.

It can be written as a sum of positive squares in 2 ways, for example, as 8491396 + 12054784 = 2914^2 + 3472^2 .

It is not an unprimeable number, because it can be changed into a prime (20546189) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18686 + ... + 19754.

It is an arithmetic number, because the mean of its divisors is an integer number (1239595).

Almost surely, 2^20546180 is an apocalyptic number.

20546180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20546180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22312710).

20546180 is an abundant number, since it is smaller than the sum of its proper divisors (24079240).

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

20546180 is a wasteful number, since it uses less digits than its factorization.

20546180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140 (or 1107 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 20546180 is about 4532.7894281557. The cubic root of 20546180 is about 273.8905382644.

The spelling of 20546180 in words is "twenty million, five hundred forty-six thousand, one hundred eighty".