16820544 has 112 divisors (see below), whose sum is σ = 50182272. Its totient is φ = 4933632.

The previous prime is 16820527. The next prime is 16820549. The reversal of 16820544 is 44502861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16820549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57262 + ... + 57554.

It is an arithmetic number, because the mean of its divisors is an integer number (448056).

Almost surely, 2^16820544 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 16820544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25091136).

16820544 is an abundant number, since it is smaller than the sum of its proper divisors (33361728).

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

16820544 is a wasteful number, since it uses less digits than its factorization.

16820544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 16820544 is about 4101.2856520852. The cubic root of 16820544 is about 256.2201881638.

The spelling of 16820544 in words is "sixteen million, eight hundred twenty thousand, five hundred forty-four".