16720227 has 6 divisors (see below), whose sum is σ = 24151452. Its totient is φ = 11146812.

The previous prime is 16720217. The next prime is 16720243. The reversal of 16720227 is 72202761.

It is not a de Polignac number, because 16720227 - 2¹¹ = 16718179 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16720227.

It is not an unprimeable number, because it can be changed into a prime (16720217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 928893 + ... + 928910.

It is an arithmetic number, because the mean of its divisors is an integer number (4025242).

Almost surely, 2^16720227 is an apocalyptic number.

16720227 is a deficient number, since it is larger than the sum of its proper divisors (7431225).

16720227 is a wasteful number, since it uses less digits than its factorization.

16720227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857809 (or 1857806 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 16720227 is about 4089.0374172903. The cubic root of 16720227 is about 255.7098101351.

Adding to 16720227 its reverse (72202761), we get a palindrome (88922988).

The spelling of 16720227 in words is "sixteen million, seven hundred twenty thousand, two hundred twenty-seven".