21303263005 has 32 divisors (see below), whose sum is σ = 26879339520. Its totient is φ = 16189320960.

The previous prime is 21303262999. The next prime is 21303263029. The reversal of 21303263005 is 50036230312.

It is a happy number.

It is not a de Polignac number, because 21303263005 - 2³ = 21303262997 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 3814315 + ... + 3819895.

It is an arithmetic number, because the mean of its divisors is an integer number (839979360).

Almost surely, 2^21303263005 is an apocalyptic number.

It is an amenable number.

21303263005 is a deficient number, since it is larger than the sum of its proper divisors (5576076515).

21303263005 is a wasteful number, since it uses less digits than its factorization.

21303263005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6109.

The product of its (nonzero) digits is 3240, while the sum is 25.

Adding to 21303263005 its reverse (50036230312), we get a palindrome (71339493317).

The spelling of 21303263005 in words is "twenty-one billion, three hundred three million, two hundred sixty-three thousand, five".