21236000303 has 32 divisors (see below), whose sum is σ = 25866086400. Its totient is φ = 17040456576.

The previous prime is 21236000299. The next prime is 21236000309. The reversal of 21236000303 is 30300063212.

It is a cyclic number.

It is not a de Polignac number, because 21236000303 - 2² = 21236000299 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21236000309) 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 in 31 ways as a sum of consecutive naturals, for example, 3743153 + ... + 3748821.

It is an arithmetic number, because the mean of its divisors is an integer number (808315200).

Almost surely, 2^21236000303 is an apocalyptic number.

21236000303 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21236000303 is a deficient number, since it is larger than the sum of its proper divisors (4630086097).

21236000303 is a wasteful number, since it uses less digits than its factorization.

21236000303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6191.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21236000303 its reverse (30300063212), we get a palindrome (51536063515).

The spelling of 21236000303 in words is "twenty-one billion, two hundred thirty-six million, three hundred three", and thus it is an aban number.