20011000027 has 2 divisors, whose sum is σ = 20011000028. Its totient is φ = 20011000026.

The previous prime is 20011000021. The next prime is 20011000039. The reversal of 20011000027 is 72000011002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20011000027 - 2³ = 20011000019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20010999980 and 20011000016.

It is not a weakly prime, because it can be changed into another prime (20011000021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005500013 + 10005500014.

It is an arithmetic number, because the mean of its divisors is an integer number (10005500014).

Almost surely, 2^20011000027 is an apocalyptic number.

20011000027 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011000027 is an equidigital number, since it uses as much as digits as its factorization.

20011000027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 13.

Adding to 20011000027 its reverse (72000011002), we get a palindrome (92011011029).

The spelling of 20011000027 in words is "twenty billion, eleven million, twenty-seven", and thus it is an aban number and an uban number.