20111232313 has 4 divisors (see below), whose sum is σ = 20440924708. Its totient is φ = 19781539920.

The previous prime is 20111232293. The next prime is 20111232329. The reversal of 20111232313 is 31323211102.

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 5316888889 + 14794343424 = 72917^2 + 121632^2 .

It is a cyclic number.

It is not a de Polignac number, because 20111232313 - 2⁹ = 20111231801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111032313) 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, 164846106 + ... + 164846227.

It is an arithmetic number, because the mean of its divisors is an integer number (5110231177).

Almost surely, 2^20111232313 is an apocalyptic number.

It is an amenable number.

20111232313 is a deficient number, since it is larger than the sum of its proper divisors (329692395).

20111232313 is an equidigital number, since it uses as much as digits as its factorization.

20111232313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329692394.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20111232313 its reverse (31323211102), we get a palindrome (51434443415).

The spelling of 20111232313 in words is "twenty billion, one hundred eleven million, two hundred thirty-two thousand, three hundred thirteen".