20420027 has 2 divisors, whose sum is σ = 20420028. Its totient is φ = 20420026.

The previous prime is 20420011. The next prime is 20420033. The reversal of 20420027 is 72002402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20420027 - 2⁴ = 20420011 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20419987 and 20420014.

It is not a weakly prime, because it can be changed into another prime (20420627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10210013 + 10210014.

It is an arithmetic number, because the mean of its divisors is an integer number (10210014).

Almost surely, 2^20420027 is an apocalyptic number.

20420027 is a deficient number, since it is larger than the sum of its proper divisors (1).

20420027 is an equidigital number, since it uses as much as digits as its factorization.

20420027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 20420027 is about 4518.8523985632. The cubic root of 20420027 is about 273.3288268475.

Adding to 20420027 its reverse (72002402), we get a palindrome (92422429).

The spelling of 20420027 in words is "twenty million, four hundred twenty thousand, twenty-seven".