20548544 has 42 divisors (see below), whose sum is σ = 42013632. Its totient is φ = 9971200.

The previous prime is 20548543. The next prime is 20548547. The reversal of 20548544 is 44584502.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 20548544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20548543) 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 5 ways as a sum of consecutive naturals, for example, 107489 + ... + 107679.

Almost surely, 2^20548544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20548544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21006816).

20548544 is an abundant number, since it is smaller than the sum of its proper divisors (21465088).

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

20548544 is an equidigital number, since it uses as much as digits as its factorization.

20548544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 32.

The square root of 20548544 is about 4533.0501872360. The cubic root of 20548544 is about 273.9010422835.

The spelling of 20548544 in words is "twenty million, five hundred forty-eight thousand, five hundred forty-four".