20782382189 has 2 divisors, whose sum is σ = 20782382190. Its totient is φ = 20782382188.

The previous prime is 20782382167. The next prime is 20782382227. The reversal of 20782382189 is 98128328702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18835366564 + 1947015625 = 137242^2 + 44125^2 .

It is a cyclic number.

It is not a de Polignac number, because 20782382189 - 2²⁴ = 20765604973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20782382149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10391191094 + 10391191095.

It is an arithmetic number, because the mean of its divisors is an integer number (10391191095).

Almost surely, 2^20782382189 is an apocalyptic number.

It is an amenable number.

20782382189 is a deficient number, since it is larger than the sum of its proper divisors (1).

20782382189 is an equidigital number, since it uses as much as digits as its factorization.

20782382189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 50.

The spelling of 20782382189 in words is "twenty billion, seven hundred eighty-two million, three hundred eighty-two thousand, one hundred eighty-nine".