20782028593 has 2 divisors, whose sum is σ = 20782028594. Its totient is φ = 20782028592.

The previous prime is 20782028567. The next prime is 20782028719. The reversal of 20782028593 is 39582028702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17591247424 + 3190781169 = 132632^2 + 56487^2 .

It is a cyclic number.

It is not a de Polignac number, because 20782028593 - 2²¹ = 20779931441 is a prime.

It is not a weakly prime, because it can be changed into another prime (20782023593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10391014296 + 10391014297.

It is an arithmetic number, because the mean of its divisors is an integer number (10391014297).

Almost surely, 2^20782028593 is an apocalyptic number.

It is an amenable number.

20782028593 is a deficient number, since it is larger than the sum of its proper divisors (1).

20782028593 is an equidigital number, since it uses as much as digits as its factorization.

20782028593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 20782028593 in words is "twenty billion, seven hundred eighty-two million, twenty-eight thousand, five hundred ninety-three".