20001242113 has 4 divisors (see below), whose sum is σ = 20001691908. Its totient is φ = 20000792320.

The previous prime is 20001242099. The next prime is 20001242119. The reversal of 20001242113 is 31124210002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31124210002 = 2 ⋅15562105001.

It can be written as a sum of positive squares in 2 ways, for example, as 10570307344 + 9430934769 = 102812^2 + 97113^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20001242113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001242119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149848 + ... + 249913.

It is an arithmetic number, because the mean of its divisors is an integer number (5000422977).

Almost surely, 2^20001242113 is an apocalyptic number.

It is an amenable number.

20001242113 is a deficient number, since it is larger than the sum of its proper divisors (449795).

20001242113 is an equidigital number, since it uses as much as digits as its factorization.

20001242113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449794.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20001242113 its reverse (31124210002), we get a palindrome (51125452115).

The spelling of 20001242113 in words is "twenty billion, one million, two hundred forty-two thousand, one hundred thirteen".