21303013333 has 16 divisors (see below), whose sum is σ = 25511178240. Its totient is φ = 17392714416.

The previous prime is 21303013289. The next prime is 21303013421. The reversal of 21303013333 is 33331030312.

It is not a de Polignac number, because 21303013333 - 2²⁵ = 21269458901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303013733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238335 + ... + 315292.

It is an arithmetic number, because the mean of its divisors is an integer number (1594448640).

Almost surely, 2^21303013333 is an apocalyptic number.

21303013333 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21303013333 is a deficient number, since it is larger than the sum of its proper divisors (4208164907).

21303013333 is a wasteful number, since it uses less digits than its factorization.

21303013333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553896.

The product of its (nonzero) digits is 1458, while the sum is 22.

Adding to 21303013333 its reverse (33331030312), we get a palindrome (54634043645).

The spelling of 21303013333 in words is "twenty-one billion, three hundred three million, thirteen thousand, three hundred thirty-three".