20670171 has 8 divisors (see below), whose sum is σ = 27608064. Its totient is φ = 13756200.

The previous prime is 20670163. The next prime is 20670173. The reversal of 20670171 is 17107602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20670171 - 2³ = 20670163 is a prime.

It is a zygodrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (20670173) 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, 3855 + ... + 7496.

It is an arithmetic number, because the mean of its divisors is an integer number (3451008).

Almost surely, 2^20670171 is an apocalyptic number.

20670171 is a deficient number, since it is larger than the sum of its proper divisors (6937893).

20670171 is a wasteful number, since it uses less digits than its factorization.

20670171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11961.

The product of its (nonzero) digits is 588, while the sum is 24.

The square root of 20670171 is about 4546.4459746048. The cubic root of 20670171 is about 274.4403870535.

Adding to 20670171 its reverse (17107602), we get a palindrome (37777773).

The spelling of 20670171 in words is "twenty million, six hundred seventy thousand, one hundred seventy-one".