21232420603 has 2 divisors, whose sum is σ = 21232420604. Its totient is φ = 21232420602.

The previous prime is 21232420549. The next prime is 21232420613. The reversal of 21232420603 is 30602423212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21232420603 - 2⁹ = 21232420091 is a prime.

It is not a weakly prime, because it can be changed into another prime (21232420613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616210301 + 10616210302.

It is an arithmetic number, because the mean of its divisors is an integer number (10616210302).

Almost surely, 2^21232420603 is an apocalyptic number.

21232420603 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232420603 is an equidigital number, since it uses as much as digits as its factorization.

21232420603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21232420603 its reverse (30602423212), we get a palindrome (51834843815).

The spelling of 21232420603 in words is "twenty-one billion, two hundred thirty-two million, four hundred twenty thousand, six hundred three".