20011111313 has 4 divisors (see below), whose sum is σ = 20012086068. Its totient is φ = 20010136560.

The previous prime is 20011111303. The next prime is 20011111321. The reversal of 20011111313 is 31311111002.

It is a happy number.

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 5770985089 + 14240126224 = 75967^2 + 119332^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011111313 - 2²² = 20006917009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20011111303) 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, 455906 + ... + 497867.

It is an arithmetic number, because the mean of its divisors is an integer number (5003021517).

Almost surely, 2^20011111313 is an apocalyptic number.

It is an amenable number.

20011111313 is a deficient number, since it is larger than the sum of its proper divisors (974755).

20011111313 is an equidigital number, since it uses as much as digits as its factorization.

20011111313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974754.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 20011111313 its reverse (31311111002), we get a palindrome (51322222315).

The spelling of 20011111313 in words is "twenty billion, eleven million, one hundred eleven thousand, three hundred thirteen".