20111244289 has 2 divisors, whose sum is σ = 20111244290. Its totient is φ = 20111244288.

The previous prime is 20111244277. The next prime is 20111244311. The reversal of 20111244289 is 98244211102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11278440000 + 8832804289 = 106200^2 + 93983^2 .

It is a cyclic number.

It is not a de Polignac number, because 20111244289 - 2⁹ = 20111243777 is a prime.

It is not a weakly prime, because it can be changed into another prime (20111244589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055622144 + 10055622145.

It is an arithmetic number, because the mean of its divisors is an integer number (10055622145).

Almost surely, 2^20111244289 is an apocalyptic number.

It is an amenable number.

20111244289 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111244289 is an equidigital number, since it uses as much as digits as its factorization.

20111244289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 34.

The spelling of 20111244289 in words is "twenty billion, one hundred eleven million, two hundred forty-four thousand, two hundred eighty-nine".