20671168 has 28 divisors (see below), whose sum is σ = 46880272. Its totient is φ = 8858880.

The previous prime is 20671163. The next prime is 20671187. The reversal of 20671168 is 86117602.

It is a tau number, because it is divible by the number of its divisors (28).

It is not an unprimeable number, because it can be changed into a prime (20671163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22623 + ... + 23518.

Almost surely, 2^20671168 is an apocalyptic number.

20671168 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20671168 is an abundant number, since it is smaller than the sum of its proper divisors (26209104).

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

20671168 is an equidigital number, since it uses as much as digits as its factorization.

20671168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46160 (or 46150 counting only the distinct ones).

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

The square root of 20671168 is about 4546.5556193673. Note that the first 3 decimals coincide. The cubic root of 20671168 is about 274.4447994129. Note that the first 3 decimals are identical.

The spelling of 20671168 in words is "twenty million, six hundred seventy-one thousand, one hundred sixty-eight".