20118201313 has 12 divisors (see below), whose sum is σ = 23538091860. Its totient is φ = 17144488032.

The previous prime is 20118201307. The next prime is 20118201331. The reversal of 20118201313 is 31310281102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17855106129 + 2263095184 = 133623^2 + 47572^2 .

It is not a de Polignac number, because 20118201313 - 2⁹ = 20118200801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20118201373) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1178158 + ... + 1195111.

It is an arithmetic number, because the mean of its divisors is an integer number (1961507655).

Almost surely, 2^20118201313 is an apocalyptic number.

It is an amenable number.

20118201313 is a deficient number, since it is larger than the sum of its proper divisors (3419890547).

20118201313 is a wasteful number, since it uses less digits than its factorization.

20118201313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2373456 (or 2373449 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 20118201313 its reverse (31310281102), we get a palindrome (51428482415).

The spelling of 20118201313 in words is "twenty billion, one hundred eighteen million, two hundred one thousand, three hundred thirteen".