21463363 has 2 divisors, whose sum is σ = 21463364. Its totient is φ = 21463362.

The previous prime is 21463339. The next prime is 21463373. The reversal of 21463363 is 36336412.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21463363 is a prime.

It is not a weakly prime, because it can be changed into another prime (21463373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10731681 + 10731682.

It is an arithmetic number, because the mean of its divisors is an integer number (10731682).

Almost surely, 2^21463363 is an apocalyptic number.

21463363 is a deficient number, since it is larger than the sum of its proper divisors (1).

21463363 is an equidigital number, since it uses as much as digits as its factorization.

21463363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 28.

The square root of 21463363 is about 4632.8568939694. The cubic root of 21463363 is about 277.9068533581.

Adding to 21463363 its reverse (36336412), we get a palindrome (57799775).

The spelling of 21463363 in words is "twenty-one million, four hundred sixty-three thousand, three hundred sixty-three".