21232363 has 2 divisors, whose sum is σ = 21232364. Its totient is φ = 21232362.

The previous prime is 21232307. The next prime is 21232369. The reversal of 21232363 is 36323212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21232363 - 2⁹ = 21231851 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (21232369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616181 + 10616182.

It is an arithmetic number, because the mean of its divisors is an integer number (10616182).

Almost surely, 2^21232363 is an apocalyptic number.

21232363 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232363 is an equidigital number, since it uses as much as digits as its factorization.

21232363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 22.

The square root of 21232363 is about 4607.8588303029. The cubic root of 21232363 is about 276.9062618608.

Adding to 21232363 its reverse (36323212), we get a palindrome (57555575).

The spelling of 21232363 in words is "twenty-one million, two hundred thirty-two thousand, three hundred sixty-three".