20850671 has 2 divisors, whose sum is σ = 20850672. Its totient is φ = 20850670.

The previous prime is 20850649. The next prime is 20850691. The reversal of 20850671 is 17605802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20850671 - 2⁶ = 20850607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20850611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10425335 + 10425336.

It is an arithmetic number, because the mean of its divisors is an integer number (10425336).

Almost surely, 2^20850671 is an apocalyptic number.

20850671 is a deficient number, since it is larger than the sum of its proper divisors (1).

20850671 is an equidigital number, since it uses as much as digits as its factorization.

20850671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 20850671 is about 4566.2534971243. The cubic root of 20850671 is about 275.2369131954.

The spelling of 20850671 in words is "twenty million, eight hundred fifty thousand, six hundred seventy-one".