20331330013 has 4 divisors (see below), whose sum is σ = 21527290620. Its totient is φ = 19135369408.

The previous prime is 20331330011. The next prime is 20331330017. The reversal of 20331330013 is 31003313302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10755141849 + 9576188164 = 103707^2 + 97858^2 .

It is a cyclic number.

It is not a de Polignac number, because 20331330013 - 2¹ = 20331330011 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 (20331330011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 597980278 + ... + 597980311.

It is an arithmetic number, because the mean of its divisors is an integer number (5381822655).

Almost surely, 2^20331330013 is an apocalyptic number.

It is an amenable number.

20331330013 is a deficient number, since it is larger than the sum of its proper divisors (1195960607).

20331330013 is a wasteful number, since it uses less digits than its factorization.

20331330013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195960606.

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

Adding to 20331330013 its reverse (31003313302), we get a palindrome (51334643315).

The spelling of 20331330013 in words is "twenty billion, three hundred thirty-one million, three hundred thirty thousand, thirteen".