20911027 has 2 divisors, whose sum is σ = 20911028. Its totient is φ = 20911026.

The previous prime is 20910977. The next prime is 20911043. The reversal of 20911027 is 72011902.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20911027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20910989 and 20911007.

It is not a weakly prime, because it can be changed into another prime (20911067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10455513 + 10455514.

It is an arithmetic number, because the mean of its divisors is an integer number (10455514).

Almost surely, 2^20911027 is an apocalyptic number.

20911027 is a deficient number, since it is larger than the sum of its proper divisors (1).

20911027 is an equidigital number, since it uses as much as digits as its factorization.

20911027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 20911027 is about 4572.8576404695. The cubic root of 20911027 is about 275.5022315293.

Adding to 20911027 its reverse (72011902), we get a palindrome (92922929).

It can be divided in two parts, 209 and 11027, that added together give a square (11236 = 106²).

The spelling of 20911027 in words is "twenty million, nine hundred eleven thousand, twenty-seven".