20011223313 has 8 divisors (see below), whose sum is σ = 29646256800. Its totient is φ = 13340815524.

The previous prime is 20011223269. The next prime is 20011223321. The reversal of 20011223313 is 31332211002.

It is a de Polignac number, because none of the positive numbers 2^k-20011223313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20011225313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370578183 + ... + 370578236.

It is an arithmetic number, because the mean of its divisors is an integer number (3705782100).

Almost surely, 2^20011223313 is an apocalyptic number.

It is an amenable number.

20011223313 is a deficient number, since it is larger than the sum of its proper divisors (9635033487).

20011223313 is an equidigital number, since it uses as much as digits as its factorization.

20011223313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741156428 (or 741156422 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20011223313 its reverse (31332211002), we get a palindrome (51343434315).

The spelling of 20011223313 in words is "twenty billion, eleven million, two hundred twenty-three thousand, three hundred thirteen".