21302027 has 2 divisors, whose sum is σ = 21302028. Its totient is φ = 21302026.

The previous prime is 21301997. The next prime is 21302051. The reversal of 21302027 is 72020312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21302027 - 2¹⁶ = 21236491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21301996 and 21302014.

It is not a weakly prime, because it can be changed into another prime (21302227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651013 + 10651014.

It is an arithmetic number, because the mean of its divisors is an integer number (10651014).

Almost surely, 2^21302027 is an apocalyptic number.

21302027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302027 is an equidigital number, since it uses as much as digits as its factorization.

21302027 is an evil number, because the sum of its binary digits is even.

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

The square root of 21302027 is about 4615.4118992783. The cubic root of 21302027 is about 277.2087770786.

Adding to 21302027 its reverse (72020312), we get a palindrome (93322339).

The spelling of 21302027 in words is "twenty-one million, three hundred two thousand, twenty-seven".