20011244311 has 4 divisors (see below), whose sum is σ = 20011753152. Its totient is φ = 20010735472.

The previous prime is 20011244269. The next prime is 20011244359. The reversal of 20011244311 is 11344211002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20011244311 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 (20011244611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189991 + ... + 275896.

It is an arithmetic number, because the mean of its divisors is an integer number (5002938288).

Almost surely, 2^20011244311 is an apocalyptic number.

20011244311 is a deficient number, since it is larger than the sum of its proper divisors (508841).

20011244311 is an equidigital number, since it uses as much as digits as its factorization.

20011244311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508840.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20011244311 its reverse (11344211002), we get a palindrome (31355455313).

The spelling of 20011244311 in words is "twenty billion, eleven million, two hundred forty-four thousand, three hundred eleven".