20011312223 has 6 divisors (see below), whose sum is σ = 23278465296. Its totient is φ = 17152553292.

The previous prime is 20011312199. The next prime is 20011312253. The reversal of 20011312223 is 32221311002.

It is not a de Polignac number, because 20011312223 - 2⁸ = 20011311967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011312253) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 204197015 + ... + 204197112.

It is an arithmetic number, because the mean of its divisors is an integer number (3879744216).

Almost surely, 2^20011312223 is an apocalyptic number.

20011312223 is a deficient number, since it is larger than the sum of its proper divisors (3267153073).

20011312223 is an equidigital number, since it uses as much as digits as its factorization.

20011312223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408394141 (or 408394134 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20011312223 its reverse (32221311002), we get a palindrome (52232623225).

The spelling of 20011312223 in words is "twenty billion, eleven million, three hundred twelve thousand, two hundred twenty-three".