21033022013 has 8 divisors (see below), whose sum is σ = 22278094200. Its totient is φ = 19788820480.

The previous prime is 21033022007. The next prime is 21033022019. The reversal of 21033022013 is 31022033012.

It is an interprime number because it is at equal distance from previous prime (21033022007) and next prime (21033022019).

It can be written as a sum of positive squares in 4 ways, for example, as 2732884729 + 18300137284 = 52277^2 + 135278^2 .

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 21033022013 - 2²⁰ = 21031973437 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21033021982 and 21033022000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033022019) 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, 167588 + ... + 264861.

It is an arithmetic number, because the mean of its divisors is an integer number (2784761775).

Almost surely, 2^21033022013 is an apocalyptic number.

It is an amenable number.

21033022013 is a deficient number, since it is larger than the sum of its proper divisors (1245072187).

21033022013 is a wasteful number, since it uses less digits than its factorization.

21033022013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435327.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21033022013 its reverse (31022033012), we get a palindrome (52055055025).

The spelling of 21033022013 in words is "twenty-one billion, thirty-three million, twenty-two thousand, thirteen".