20111027 has 2 divisors, whose sum is σ = 20111028. Its totient is φ = 20111026.

The previous prime is 20111023. The next prime is 20111053. The reversal of 20111027 is 72011102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20111027 - 2² = 20111023 is a prime.

It is not a weakly prime, because it can be changed into another prime (20111023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055513 + 10055514.

It is an arithmetic number, because the mean of its divisors is an integer number (10055514).

Almost surely, 2^20111027 is an apocalyptic number.

20111027 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111027 is an equidigital number, since it uses as much as digits as its factorization.

20111027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 20111027 is about 4484.5319711203. The cubic root of 20111027 is about 271.9431244619.

Adding to 20111027 its reverse (72011102), we get a palindrome (92122129).

The spelling of 20111027 in words is "twenty million, one hundred eleven thousand, twenty-seven".