20405027 has 2 divisors, whose sum is σ = 20405028. Its totient is φ = 20405026.

The previous prime is 20404999. The next prime is 20405039. The reversal of 20405027 is 72050402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20405027 - 2⁸ = 20404771 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20405057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10202513 + 10202514.

It is an arithmetic number, because the mean of its divisors is an integer number (10202514).

Almost surely, 2^20405027 is an apocalyptic number.

20405027 is a deficient number, since it is larger than the sum of its proper divisors (1).

20405027 is an equidigital number, since it uses as much as digits as its factorization.

20405027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 20405027 is about 4517.1923802291. The cubic root of 20405027 is about 273.2618837967.

Adding to 20405027 its reverse (72050402), we get a palindrome (92455429).

The spelling of 20405027 in words is "twenty million, four hundred five thousand, twenty-seven".