20027911 has 2 divisors, whose sum is σ = 20027912. Its totient is φ = 20027910.

The previous prime is 20027899. The next prime is 20027933. The reversal of 20027911 is 11972002.

It is an a-pointer prime, because the next prime (20027933) can be obtained adding 20027911 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20027911 - 2⁵ = 20027879 is a prime.

It is a super-2 number, since 2×20027911² = 802234438047842, which contains 22 as substring.

It is equal to p_1272280 and since 20027911 and 1272280 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20027941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10013955 + 10013956.

It is an arithmetic number, because the mean of its divisors is an integer number (10013956).

Almost surely, 2^20027911 is an apocalyptic number.

20027911 is a deficient number, since it is larger than the sum of its proper divisors (1).

20027911 is an equidigital number, since it uses as much as digits as its factorization.

20027911 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 20027911 is about 4475.2554117056. The cubic root of 20027911 is about 271.5679731497.

Adding to 20027911 its reverse (11972002), we get a palindrome (31999913).

The spelling of 20027911 in words is "twenty million, twenty-seven thousand, nine hundred eleven".