20751074213 has 2 divisors, whose sum is σ = 20751074214. Its totient is φ = 20751074212.

The previous prime is 20751074209. The next prime is 20751074233. The reversal of 20751074213 is 31247015702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14356353124 + 6394721089 = 119818^2 + 79967^2 .

It is a cyclic number.

It is not a de Polignac number, because 20751074213 - 2² = 20751074209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20751074213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20751074233) 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, 10375537106 + 10375537107.

It is an arithmetic number, because the mean of its divisors is an integer number (10375537107).

Almost surely, 2^20751074213 is an apocalyptic number.

It is an amenable number.

20751074213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20751074213 is an equidigital number, since it uses as much as digits as its factorization.

20751074213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 32.

Adding to 20751074213 its reverse (31247015702), we get a palindrome (51998089915).

The spelling of 20751074213 in words is "twenty billion, seven hundred fifty-one million, seventy-four thousand, two hundred thirteen".