21303250535 has 24 divisors (see below), whose sum is σ = 29746284480. Its totient is φ = 14603676864.

The previous prime is 21303250531. The next prime is 21303250543. The reversal of 21303250535 is 53505230312.

It is not a de Polignac number, because 21303250535 - 2² = 21303250531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21303250498 and 21303250507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303250531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 988697 + ... + 1010013.

It is an arithmetic number, because the mean of its divisors is an integer number (1239428520).

Almost surely, 2^21303250535 is an apocalyptic number.

21303250535 is a deficient number, since it is larger than the sum of its proper divisors (8443033945).

21303250535 is a wasteful number, since it uses less digits than its factorization.

21303250535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25415 (or 25408 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 29.

Adding to 21303250535 its reverse (53505230312), we get a palindrome (74808480847).

The spelling of 21303250535 in words is "twenty-one billion, three hundred three million, two hundred fifty thousand, five hundred thirty-five".