20272206749 has 2 divisors, whose sum is σ = 20272206750. Its totient is φ = 20272206748.

The previous prime is 20272206737. The next prime is 20272206781. The reversal of 20272206749 is 94760227202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19229368900 + 1042837849 = 138670^2 + 32293^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20272206749 is a prime.

It is a super-2 number, since 2×20272206749² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain 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 (20272206949) 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 as a sum of consecutive naturals, namely, 10136103374 + 10136103375.

It is an arithmetic number, because the mean of its divisors is an integer number (10136103375).

Almost surely, 2^20272206749 is an apocalyptic number.

It is an amenable number.

20272206749 is a deficient number, since it is larger than the sum of its proper divisors (1).

20272206749 is an equidigital number, since it uses as much as digits as its factorization.

20272206749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 41.

The spelling of 20272206749 in words is "twenty billion, two hundred seventy-two million, two hundred six thousand, seven hundred forty-nine".