21076603 has 2 divisors, whose sum is σ = 21076604. Its totient is φ = 21076602.

The previous prime is 21076577. The next prime is 21076607. The reversal of 21076603 is 30667012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21076603 - 2²¹ = 18979451 is a prime.

It is not a weakly prime, because it can be changed into another prime (21076607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10538301 + 10538302.

It is an arithmetic number, because the mean of its divisors is an integer number (10538302).

Almost surely, 2^21076603 is an apocalyptic number.

21076603 is a deficient number, since it is larger than the sum of its proper divisors (1).

21076603 is an equidigital number, since it uses as much as digits as its factorization.

21076603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 21076603 is about 4590.9261592842. The cubic root of 21076603 is about 276.2274738496.

The spelling of 21076603 in words is "twenty-one million, seventy-six thousand, six hundred three".