16630220 has 24 divisors (see below), whose sum is σ = 35020944. Its totient is φ = 6633536.

The previous prime is 16630193. The next prime is 16630223. The reversal of 16630220 is 2203661.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 16630192 and 16630201.

It is not an unprimeable number, because it can be changed into a prime (16630223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7922 + ... + 9798.

It is an arithmetic number, because the mean of its divisors is an integer number (1459206).

Almost surely, 2^16630220 is an apocalyptic number.

16630220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16630220 is an abundant number, since it is smaller than the sum of its proper divisors (18390724).

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

16630220 is a wasteful number, since it uses less digits than its factorization.

16630220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2329 (or 2327 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 16630220 is about 4078.0166748065. The cubic root of 16630220 is about 255.2501454118.

Adding to 16630220 its reverse (2203661), we get a palindrome (18833881).

The spelling of 16630220 in words is "sixteen million, six hundred thirty thousand, two hundred twenty".