20669027 has 2 divisors, whose sum is σ = 20669028. Its totient is φ = 20669026.

The previous prime is 20669009. The next prime is 20669039. The reversal of 20669027 is 72096602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20669027 - 2⁸ = 20668771 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20668984 and 20669002.

It is not a weakly prime, because it can be changed into another prime (20669087) 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, 10334513 + 10334514.

It is an arithmetic number, because the mean of its divisors is an integer number (10334514).

Almost surely, 2^20669027 is an apocalyptic number.

20669027 is a deficient number, since it is larger than the sum of its proper divisors (1).

20669027 is an equidigital number, since it uses as much as digits as its factorization.

20669027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 20669027 is about 4546.3201603055. The cubic root of 20669027 is about 274.4353239508.

The spelling of 20669027 in words is "twenty million, six hundred sixty-nine thousand, twenty-seven".