21227363 has 2 divisors, whose sum is σ = 21227364. Its totient is φ = 21227362.

The previous prime is 21227357. The next prime is 21227377. The reversal of 21227363 is 36372212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21227363 - 2¹⁴ = 21210979 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21227303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10613681 + 10613682.

It is an arithmetic number, because the mean of its divisors is an integer number (10613682).

Almost surely, 2^21227363 is an apocalyptic number.

21227363 is a deficient number, since it is larger than the sum of its proper divisors (1).

21227363 is an equidigital number, since it uses as much as digits as its factorization.

21227363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 26.

The square root of 21227363 is about 4607.3162470141. The cubic root of 21227363 is about 276.8845239757.

Adding to 21227363 its reverse (36372212), we get a palindrome (57599575).

The spelling of 21227363 in words is "twenty-one million, two hundred twenty-seven thousand, three hundred sixty-three".