20000389 has 2 divisors, whose sum is σ = 20000390. Its totient is φ = 20000388.

The previous prime is 20000377. The next prime is 20000429. The reversal of 20000389 is 98300002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10452289 + 9548100 = 3233^2 + 3090^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20000389 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20000329) 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, 10000194 + 10000195.

It is an arithmetic number, because the mean of its divisors is an integer number (10000195).

Almost surely, 2^20000389 is an apocalyptic number.

It is an amenable number.

20000389 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000389 is an equidigital number, since it uses as much as digits as its factorization.

20000389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 20000389 is about 4472.1794463103. The cubic root of 20000389 is about 271.4435214955.

The spelling of 20000389 in words is "twenty million, three hundred eighty-nine", and thus it is an aban number.