21700963 has 2 divisors, whose sum is σ = 21700964. Its totient is φ = 21700962.

The previous prime is 21700957. The next prime is 21700969. The reversal of 21700963 is 36900712.

It is a balanced prime because it is at equal distance from previous prime (21700957) and next prime (21700969).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21700963 is a prime.

It is not a weakly prime, because it can be changed into another prime (21700969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10850481 + 10850482.

It is an arithmetic number, because the mean of its divisors is an integer number (10850482).

Almost surely, 2^21700963 is an apocalyptic number.

21700963 is a deficient number, since it is larger than the sum of its proper divisors (1).

21700963 is an equidigital number, since it uses as much as digits as its factorization.

21700963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 21700963 is about 4658.4292417080. The cubic root of 21700963 is about 278.9285711897.

The spelling of 21700963 in words is "twenty-one million, seven hundred thousand, nine hundred sixty-three".