20657027 has 2 divisors, whose sum is σ = 20657028. Its totient is φ = 20657026.

The previous prime is 20656991. The next prime is 20657041. The reversal of 20657027 is 72075602.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20657027 - 2⁶ = 20656963 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20657327) 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, 10328513 + 10328514.

It is an arithmetic number, because the mean of its divisors is an integer number (10328514).

Almost surely, 2^20657027 is an apocalyptic number.

20657027 is a deficient number, since it is larger than the sum of its proper divisors (1).

20657027 is an equidigital number, since it uses as much as digits as its factorization.

20657027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 20657027 is about 4545.0002200220. Note that the first 3 decimals coincide. The cubic root of 20657027 is about 274.3822032207.

The spelling of 20657027 in words is "twenty million, six hundred fifty-seven thousand, twenty-seven".