20571168 has 24 divisors (see below), whose sum is σ = 53999568. Its totient is φ = 6857024.

The previous prime is 20571163. The next prime is 20571169. The reversal of 20571168 is 86117502.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (20571163) 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, 107046 + ... + 107237.

It is an arithmetic number, because the mean of its divisors is an integer number (2249982).

Almost surely, 2^20571168 is an apocalyptic number.

It is an amenable number.

20571168 is an abundant number, since it is smaller than the sum of its proper divisors (33428400).

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

20571168 is a wasteful number, since it uses less digits than its factorization.

20571168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214296 (or 214288 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 20571168 is about 4535.5449507198. The cubic root of 20571168 is about 274.0015273327.

The spelling of 20571168 in words is "twenty million, five hundred seventy-one thousand, one hundred sixty-eight".