20344136235013 has 8 divisors (see below), whose sum is σ = 20390246382528. Its totient is φ = 20298073213824.

The previous prime is 20344136234971. The next prime is 20344136235091. The reversal of 20344136235013 is 31053263144302.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20344136235013 is a prime.

It is a super-2 number, since 2×20344136235013² (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 (20344136235113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10917145 + ... + 12644062.

It is an arithmetic number, because the mean of its divisors is an integer number (2548780797816).

Almost surely, 2^{20344136235013} is an apocalyptic number.

It is an amenable number.

20344136235013 is a deficient number, since it is larger than the sum of its proper divisors (46110147515).

20344136235013 is a wasteful number, since it uses less digits than its factorization.

20344136235013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23563163.

The product of its (nonzero) digits is 155520, while the sum is 37.

Adding to 20344136235013 its reverse (31053263144302), we get a palindrome (51397399379315).

The spelling of 20344136235013 in words is "twenty trillion, three hundred forty-four billion, one hundred thirty-six million, two hundred thirty-five thousand, thirteen".