20171027 has 16 divisors (see below), whose sum is σ = 22667040. Its totient is φ = 17837568.

The previous prime is 20171017. The next prime is 20171051. The reversal of 20171027 is 72017102.

It is a cyclic number.

It is not a de Polignac number, because 20171027 - 2⁶ = 20170963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20171017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63473 + ... + 63789.

It is an arithmetic number, because the mean of its divisors is an integer number (1416690).

Almost surely, 2^20171027 is an apocalyptic number.

20171027 is a deficient number, since it is larger than the sum of its proper divisors (2496013).

20171027 is a wasteful number, since it uses less digits than its factorization.

20171027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550.

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 20171027 is about 4491.2166503076. The cubic root of 20171027 is about 272.2132977653.

Adding to 20171027 its reverse (72017102), we get a palindrome (92188129).

The spelling of 20171027 in words is "twenty million, one hundred seventy-one thousand, twenty-seven".