21320333013 has 24 divisors (see below), whose sum is σ = 34208563680. Its totient is φ = 11762940000.

The previous prime is 21320333011. The next prime is 21320333033. The reversal of 21320333013 is 31033302312.

It is not a de Polignac number, because 21320333013 - 2¹ = 21320333011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320333011) 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, 2496363 + ... + 2504888.

It is an arithmetic number, because the mean of its divisors is an integer number (1425356820).

Almost surely, 2^21320333013 is an apocalyptic number.

It is an amenable number.

21320333013 is a deficient number, since it is larger than the sum of its proper divisors (12888230667).

21320333013 is a wasteful number, since it uses less digits than its factorization.

21320333013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5001297 (or 5001290 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21320333013 its reverse (31033302312), we get a palindrome (52353635325).

The spelling of 21320333013 in words is "twenty-one billion, three hundred twenty million, three hundred thirty-three thousand, thirteen".