21232963 has 2 divisors, whose sum is σ = 21232964. Its totient is φ = 21232962.

The previous prime is 21232943. The next prime is 21232969. The reversal of 21232963 is 36923212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21232963 - 2⁹ = 21232451 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 (21232969) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616481 + 10616482.

It is an arithmetic number, because the mean of its divisors is an integer number (10616482).

Almost surely, 2^21232963 is an apocalyptic number.

21232963 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232963 is an equidigital number, since it uses as much as digits as its factorization.

21232963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 28.

The square root of 21232963 is about 4607.9239360042. The cubic root of 21232963 is about 276.9088701777.

The spelling of 21232963 in words is "twenty-one million, two hundred thirty-two thousand, nine hundred sixty-three".