21036204303 has 4 divisors (see below), whose sum is σ = 28048272408. Its totient is φ = 14024136200.

The previous prime is 21036204289. The next prime is 21036204313. The reversal of 21036204303 is 30340263012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21036204303 - 2⁹ = 21036203791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21036204313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3506034048 + ... + 3506034053.

It is an arithmetic number, because the mean of its divisors is an integer number (7012068102).

Almost surely, 2^21036204303 is an apocalyptic number.

21036204303 is a deficient number, since it is larger than the sum of its proper divisors (7012068105).

21036204303 is an equidigital number, since it uses as much as digits as its factorization.

21036204303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7012068104.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21036204303 its reverse (30340263012), we get a palindrome (51376467315).

The spelling of 21036204303 in words is "twenty-one billion, thirty-six million, two hundred four thousand, three hundred three".