20734369 has 2 divisors, whose sum is σ = 20734370. Its totient is φ = 20734368.

The previous prime is 20734367. The next prime is 20734403. The reversal of 20734369 is 96343702.

It is an a-pointer prime, because the next prime (20734403) can be obtained adding 20734369 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11662225 + 9072144 = 3415^2 + 3012^2 .

It is a cyclic number.

It is not a de Polignac number, because 20734369 - 2¹ = 20734367 is a prime.

It is a super-2 number, since 2×20734369² = 859828115656322, which contains 22 as substring.

Together with 20734367, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20734361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10367184 + 10367185.

It is an arithmetic number, because the mean of its divisors is an integer number (10367185).

Almost surely, 2^20734369 is an apocalyptic number.

It is an amenable number.

20734369 is a deficient number, since it is larger than the sum of its proper divisors (1).

20734369 is an equidigital number, since it uses as much as digits as its factorization.

20734369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 20734369 is about 4553.5007411880. The cubic root of 20734369 is about 274.7242149802.

The spelling of 20734369 in words is "twenty million, seven hundred thirty-four thousand, three hundred sixty-nine".