20909027 has 2 divisors, whose sum is σ = 20909028. Its totient is φ = 20909026.

The previous prime is 20909023. The next prime is 20909039. The reversal of 20909027 is 72090902.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20909027 - 2² = 20909023 is a prime.

It is not a weakly prime, because it can be changed into another prime (20909023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10454513 + 10454514.

It is an arithmetic number, because the mean of its divisors is an integer number (10454514).

Almost surely, 2^20909027 is an apocalyptic number.

20909027 is a deficient number, since it is larger than the sum of its proper divisors (1).

20909027 is an equidigital number, since it uses as much as digits as its factorization.

20909027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 20909027 is about 4572.6389536022. The cubic root of 20909027 is about 275.4934479334.

Adding to 20909027 its reverse (72090902), we get a palindrome (92999929).

The spelling of 20909027 in words is "twenty million, nine hundred nine thousand, twenty-seven".