20171168 has 12 divisors (see below), whose sum is σ = 39712050. Its totient is φ = 10085568.

The previous prime is 20171147. The next prime is 20171189. The reversal of 20171168 is 86117102.

It is an interprime number because it is at equal distance from previous prime (20171147) and next prime (20171189).

It can be written as a sum of positive squares in only one way, i.e., 19114384 + 1056784 = 4372^2 + 1028^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315143 + ... + 315206.

Almost surely, 2^20171168 is an apocalyptic number.

It is an amenable number.

20171168 is a deficient number, since it is larger than the sum of its proper divisors (19540882).

20171168 is an equidigital number, since it uses as much as digits as its factorization.

20171168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630359 (or 630351 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 20171168 is about 4491.2323475857. The cubic root of 20171168 is about 272.2139320412.

The spelling of 20171168 in words is "twenty million, one hundred seventy-one thousand, one hundred sixty-eight".