16720168 has 8 divisors (see below), whose sum is σ = 31350330. Its totient is φ = 8360080.

The previous prime is 16720157. The next prime is 16720177. The reversal of 16720168 is 86102761.

16720168 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 only one way, i.e., 15984004 + 736164 = 3998^2 + 858^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1045003 + ... + 1045018.

Almost surely, 2^16720168 is an apocalyptic number.

It is an amenable number.

16720168 is a deficient number, since it is larger than the sum of its proper divisors (14630162).

16720168 is a wasteful number, since it uses less digits than its factorization.

16720168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090027 (or 2090023 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 16720168 is about 4089.0302028721. The cubic root of 16720168 is about 255.7095093637.

The spelling of 16720168 in words is "sixteen million, seven hundred twenty thousand, one hundred sixty-eight".