21020003027 has 2 divisors, whose sum is σ = 21020003028. Its totient is φ = 21020003026.

The previous prime is 21020002987. The next prime is 21020003033. The reversal of 21020003027 is 72030002012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21020003027 - 2⁶ = 21020002963 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21020002996 and 21020003014.

It is not a weakly prime, because it can be changed into another prime (21020003047) 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, 10510001513 + 10510001514.

It is an arithmetic number, because the mean of its divisors is an integer number (10510001514).

Almost surely, 2^21020003027 is an apocalyptic number.

21020003027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020003027 is an equidigital number, since it uses as much as digits as its factorization.

21020003027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 17.

Adding to 21020003027 its reverse (72030002012), we get a palindrome (93050005039).

The spelling of 21020003027 in words is "twenty-one billion, twenty million, three thousand, twenty-seven".