20730120769 has 2 divisors, whose sum is σ = 20730120770. Its totient is φ = 20730120768.

The previous prime is 20730120767. The next prime is 20730120787. The reversal of 20730120769 is 96702103702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16256250000 + 4473870769 = 127500^2 + 66887^2 .

It is a cyclic number.

It is not a de Polignac number, because 20730120769 - 2¹ = 20730120767 is a prime.

It is a super-2 number, since 2×20730120769² (a number of 21 digits) contains 22 as substring.

Together with 20730120767, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20730120767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10365060384 + 10365060385.

It is an arithmetic number, because the mean of its divisors is an integer number (10365060385).

Almost surely, 2^20730120769 is an apocalyptic number.

It is an amenable number.

20730120769 is a deficient number, since it is larger than the sum of its proper divisors (1).

20730120769 is an equidigital number, since it uses as much as digits as its factorization.

20730120769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 37.

The spelling of 20730120769 in words is "twenty billion, seven hundred thirty million, one hundred twenty thousand, seven hundred sixty-nine".