20696283989 has 2 divisors, whose sum is σ = 20696283990. Its totient is φ = 20696283988.

The previous prime is 20696283967. The next prime is 20696283991. The reversal of 20696283989 is 98938269602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20687931889 + 8352100 = 143833^2 + 2890^2 .

It is a cyclic number.

It is not a de Polignac number, because 20696283989 - 2⁸ = 20696283733 is a prime.

It is a super-3 number, since 3×20696283989³ (a number of 32 digits) contains 333 as substring.

Together with 20696283991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20696282989) 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, 10348141994 + 10348141995.

It is an arithmetic number, because the mean of its divisors is an integer number (10348141995).

Almost surely, 2^20696283989 is an apocalyptic number.

It is an amenable number.

20696283989 is a deficient number, since it is larger than the sum of its proper divisors (1).

20696283989 is an equidigital number, since it uses as much as digits as its factorization.

20696283989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20155392, while the sum is 62.

The spelling of 20696283989 in words is "twenty billion, six hundred ninety-six million, two hundred eighty-three thousand, nine hundred eighty-nine".