20111244247 has 2 divisors, whose sum is σ = 20111244248. Its totient is φ = 20111244246.

The previous prime is 20111244227. The next prime is 20111244253. The reversal of 20111244247 is 74244211102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20111244247 - 2⁷ = 20111244119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20111244227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055622123 + 10055622124.

It is an arithmetic number, because the mean of its divisors is an integer number (10055622124).

Almost surely, 2^20111244247 is an apocalyptic number.

20111244247 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111244247 is an equidigital number, since it uses as much as digits as its factorization.

20111244247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 28.

Adding to 20111244247 its reverse (74244211102), we get a palindrome (94355455349).

The spelling of 20111244247 in words is "twenty billion, one hundred eleven million, two hundred forty-four thousand, two hundred forty-seven".