16745220 has 72 divisors (see below), whose sum is σ = 52055640. Its totient is φ = 4354560.

The previous prime is 16745159. The next prime is 16745231. The reversal of 16745220 is 2254761.

16745220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1016064 + 15729156 = 1008^2 + 3966^2 .

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, 6246 + ... + 8514.

It is an arithmetic number, because the mean of its divisors is an integer number (722995).

Almost surely, 2^16745220 is an apocalyptic number.

16745220 is a gapful number since it is divisible by the number (10) 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 16745220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26027820).

16745220 is an abundant number, since it is smaller than the sum of its proper divisors (35310420).

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

16745220 is a wasteful number, since it uses less digits than its factorization.

16745220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2325 (or 2320 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 16745220 is about 4092.0923743239. The cubic root of 16745220 is about 255.8371563642.

Adding to 16745220 its reverse (2254761), we get a palindrome (18999981).

The spelling of 16745220 in words is "sixteen million, seven hundred forty-five thousand, two hundred twenty".