20003310331013 has 4 divisors (see below), whose sum is σ = 21179975644620. Its totient is φ = 18826645017408.

The previous prime is 20003310331001. The next prime is 20003310331033. The reversal of 20003310331013 is 31013301330002.

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 5977521340609 + 14025788990404 = 2444897^2 + 3745102^2 .

It is a cyclic number.

It is not a de Polignac number, because 20003310331013 - 2¹⁸ = 20003310068869 is a prime.

It is a super-2 number, since 2×20003310331013² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003310331033) 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, 588332656778 + ... + 588332656811.

It is an arithmetic number, because the mean of its divisors is an integer number (5294993911155).

Almost surely, 2^{20003310331013} is an apocalyptic number.

It is an amenable number.

20003310331013 is a deficient number, since it is larger than the sum of its proper divisors (1176665313607).

20003310331013 is a wasteful number, since it uses less digits than its factorization.

20003310331013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176665313606.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 20003310331013 its reverse (31013301330002), we get a palindrome (51016611661015).

The spelling of 20003310331013 in words is "twenty trillion, three billion, three hundred ten million, three hundred thirty-one thousand, thirteen".