20718168 has 32 divisors (see below), whose sum is σ = 53468160. Its totient is φ = 6683040.

The previous prime is 20718167. The next prime is 20718179. The reversal of 20718168 is 86181702.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20718163) 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, 13180 + ... + 14667.

It is an arithmetic number, because the mean of its divisors is an integer number (1670880).

Almost surely, 2^20718168 is an apocalyptic number.

It is an amenable number.

20718168 is an abundant number, since it is smaller than the sum of its proper divisors (32749992).

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

20718168 is a wasteful number, since it uses less digits than its factorization.

20718168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27887 (or 27883 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 20718168 is about 4551.7214326011. The cubic root of 20718168 is about 274.6526435274.

The spelling of 20718168 in words is "twenty million, seven hundred eighteen thousand, one hundred sixty-eight".