20544120 has 96 divisors (see below), whose sum is σ = 67392000. Its totient is φ = 5427456.

The previous prime is 20544119. The next prime is 20544169. The reversal of 20544120 is 2144502.

20544120 is a `hidden beast` number, since 2 + 0 + 544 + 120 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20544093 and 20544102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53449 + ... + 53831.

It is an arithmetic number, because the mean of its divisors is an integer number (702000).

Almost surely, 2^20544120 is an apocalyptic number.

20544120 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 20544120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33696000).

20544120 is an abundant number, since it is smaller than the sum of its proper divisors (46847880).

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

20544120 is a wasteful number, since it uses less digits than its factorization.

20544120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549 (or 542 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 20544120 is about 4532.5621893141. The cubic root of 20544120 is about 273.8813843590.

Adding to 20544120 its reverse (2144502), we get a palindrome (22688622).

The spelling of 20544120 in words is "twenty million, five hundred forty-four thousand, one hundred twenty".