20011332749 has 2 divisors, whose sum is σ = 20011332750. Its totient is φ = 20011332748.

The previous prime is 20011332743. The next prime is 20011332751. The reversal of 20011332749 is 94723311002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11209515625 + 8801817124 = 105875^2 + 93818^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20011332749 is a prime.

It is a Sophie Germain prime.

Together with 20011332751, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011332743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005666374 + 10005666375.

It is an arithmetic number, because the mean of its divisors is an integer number (10005666375).

Almost surely, 2^20011332749 is an apocalyptic number.

It is an amenable number.

20011332749 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011332749 is an equidigital number, since it uses as much as digits as its factorization.

20011332749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The spelling of 20011332749 in words is "twenty billion, eleven million, three hundred thirty-two thousand, seven hundred forty-nine".