20382889 has 2 divisors, whose sum is σ = 20382890. Its totient is φ = 20382888.

The previous prime is 20382833. The next prime is 20382917. The reversal of 20382889 is 98828302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16646400 + 3736489 = 4080^2 + 1933^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20382889 is a prime.

It is not a weakly prime, because it can be changed into another prime (20382589) 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, 10191444 + 10191445.

It is an arithmetic number, because the mean of its divisors is an integer number (10191445).

Almost surely, 2^20382889 is an apocalyptic number.

It is an amenable number.

20382889 is a deficient number, since it is larger than the sum of its proper divisors (1).

20382889 is an equidigital number, since it uses as much as digits as its factorization.

20382889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 20382889 is about 4514.7412993437. The cubic root of 20382889 is about 273.1630248137.

The spelling of 20382889 in words is "twenty million, three hundred eighty-two thousand, eight hundred eighty-nine".