20164271 has 2 divisors, whose sum is σ = 20164272. Its totient is φ = 20164270.

The previous prime is 20164267. The next prime is 20164273. The reversal of 20164271 is 17246102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20164271 - 2² = 20164267 is a prime.

It is a super-2 number, since 2×20164271² = 813195649922882, which contains 22 as substring.

Together with 20164273, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20164273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10082135 + 10082136.

It is an arithmetic number, because the mean of its divisors is an integer number (10082136).

Almost surely, 2^20164271 is an apocalyptic number.

20164271 is a deficient number, since it is larger than the sum of its proper divisors (1).

20164271 is an equidigital number, since it uses as much as digits as its factorization.

20164271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 20164271 is about 4490.4644525928. The cubic root of 20164271 is about 272.1829030412.

The spelling of 20164271 in words is "twenty million, one hundred sixty-four thousand, two hundred seventy-one".