21013323013 has 8 divisors (see below), whose sum is σ = 22040428032. Its totient is φ = 20010385296.

The previous prime is 21013323007. The next prime is 21013323041. The reversal of 21013323013 is 31032331012.

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 21013323013 - 2²¹ = 21011225861 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 (21013323613) 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, 6040045 + ... + 6043522.

It is an arithmetic number, because the mean of its divisors is an integer number (2755053504).

Almost surely, 2^21013323013 is an apocalyptic number.

It is an amenable number.

21013323013 is a deficient number, since it is larger than the sum of its proper divisors (1027105019).

21013323013 is a wasteful number, since it uses less digits than its factorization.

21013323013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12083651.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21013323013 its reverse (31032331012), we get a palindrome (52045654025).

The spelling of 21013323013 in words is "twenty-one billion, thirteen million, three hundred twenty-three thousand, thirteen".