16946220 has 72 divisors (see below), whose sum is σ = 49016016. Its totient is φ = 4372992.

The previous prime is 16946213. The next prime is 16946221. The reversal of 16946220 is 2264961.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (16946221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 232104 + ... + 232176.

It is an arithmetic number, because the mean of its divisors is an integer number (680778).

Almost surely, 2^16946220 is an apocalyptic number.

16946220 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 16946220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24508008).

16946220 is an abundant number, since it is smaller than the sum of its proper divisors (32069796).

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

16946220 is a wasteful number, since it uses less digits than its factorization.

16946220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 16946220 is about 4116.5786765225. The cubic root of 16946220 is about 256.8567284735.

The spelling of 16946220 in words is "sixteen million, nine hundred forty-six thousand, two hundred twenty".