20003520336871 has 4 divisors (see below), whose sum is σ = 20209742196112. Its totient is φ = 19797298477632.

The previous prime is 20003520336869. The next prime is 20003520336911. The reversal of 20003520336871 is 17863302530002.

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

It is a cyclic number.

It is not a de Polignac number, because 20003520336871 - 2¹ = 20003520336869 is a prime.

It is a super-2 number, since 2×20003520336871² (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 (20003520334871) 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, 103110929475 + ... + 103110929668.

It is an arithmetic number, because the mean of its divisors is an integer number (5052435549028).

Almost surely, 2^{20003520336871} is an apocalyptic number.

20003520336871 is a deficient number, since it is larger than the sum of its proper divisors (206221859241).

20003520336871 is an equidigital number, since it uses as much as digits as its factorization.

20003520336871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206221859240.

The product of its (nonzero) digits is 181440, while the sum is 40.

Adding to 20003520336871 its reverse (17863302530002), we get a palindrome (37866822866873).

The spelling of 20003520336871 in words is "twenty trillion, three billion, five hundred twenty million, three hundred thirty-six thousand, eight hundred seventy-one".