21033300313 has 8 divisors (see below), whose sum is σ = 21457866600. Its totient is φ = 20612917248.

The previous prime is 21033300263. The next prime is 21033300347. The reversal of 21033300313 is 31300333012.

It can be written as a sum of positive squares in 4 ways, for example, as 2934172224 + 18099128089 = 54168^2 + 134533^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21033300313 - 2²¹ = 21031203161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21033300373) 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 7 ways as a sum of consecutive naturals, for example, 1035648 + ... + 1055761.

It is an arithmetic number, because the mean of its divisors is an integer number (2682233325).

Almost surely, 2^21033300313 is an apocalyptic number.

It is an amenable number.

21033300313 is a deficient number, since it is larger than the sum of its proper divisors (424566287).

21033300313 is a wasteful number, since it uses less digits than its factorization.

21033300313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2091611.

The product of its (nonzero) digits is 486, while the sum is 19.

Adding to 21033300313 its reverse (31300333012), we get a palindrome (52333633325).

The spelling of 21033300313 in words is "twenty-one billion, thirty-three million, three hundred thousand, three hundred thirteen".