20077171 has 2 divisors, whose sum is σ = 20077172. Its totient is φ = 20077170.

The previous prime is 20077163. The next prime is 20077217. The reversal of 20077171 is 17177002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20077171 - 2³ = 20077163 is a prime.

It is equal to p_1275226 and since 20077171 and 1275226 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (20077121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10038585 + 10038586.

It is an arithmetic number, because the mean of its divisors is an integer number (10038586).

Almost surely, 2^20077171 is an apocalyptic number.

20077171 is a deficient number, since it is larger than the sum of its proper divisors (1).

20077171 is an equidigital number, since it uses as much as digits as its factorization.

20077171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 686, while the sum is 25.

The square root of 20077171 is about 4480.7556282395. The cubic root of 20077171 is about 271.7904374521.

The spelling of 20077171 in words is "twenty million, seventy-seven thousand, one hundred seventy-one".