21332963 has 2 divisors, whose sum is σ = 21332964. Its totient is φ = 21332962.

The previous prime is 21332959. The next prime is 21333007. The reversal of 21332963 is 36923312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21332963 - 2² = 21332959 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21331963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666481 + 10666482.

It is an arithmetic number, because the mean of its divisors is an integer number (10666482).

Almost surely, 2^21332963 is an apocalyptic number.

21332963 is a deficient number, since it is larger than the sum of its proper divisors (1).

21332963 is an equidigital number, since it uses as much as digits as its factorization.

21332963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 29.

The square root of 21332963 is about 4618.7620635837. The cubic root of 21332963 is about 277.3429048885.

The spelling of 21332963 in words is "twenty-one million, three hundred thirty-two thousand, nine hundred sixty-three".