21235660603 has 2 divisors, whose sum is σ = 21235660604. Its totient is φ = 21235660602.

The previous prime is 21235660597. The next prime is 21235660627. The reversal of 21235660603 is 30606653212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21235660603 - 2²⁹ = 20698789691 is a prime.

It is not a weakly prime, because it can be changed into another prime (21235660673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10617830301 + 10617830302.

It is an arithmetic number, because the mean of its divisors is an integer number (10617830302).

Almost surely, 2^21235660603 is an apocalyptic number.

21235660603 is a deficient number, since it is larger than the sum of its proper divisors (1).

21235660603 is an equidigital number, since it uses as much as digits as its factorization.

21235660603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 34.

The spelling of 21235660603 in words is "twenty-one billion, two hundred thirty-five million, six hundred sixty thousand, six hundred three".