20306725193 has 2 divisors, whose sum is σ = 20306725194. Its totient is φ = 20306725192.

The previous prime is 20306725183. The next prime is 20306725223. The reversal of 20306725193 is 39152760302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19331287369 + 975437824 = 139037^2 + 31232^2 .

It is a cyclic number.

It is not a de Polignac number, because 20306725193 - 2¹⁸ = 20306463049 is a prime.

It is not a weakly prime, because it can be changed into another prime (20306725163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10153362596 + 10153362597.

It is an arithmetic number, because the mean of its divisors is an integer number (10153362597).

Almost surely, 2^20306725193 is an apocalyptic number.

It is an amenable number.

20306725193 is a deficient number, since it is larger than the sum of its proper divisors (1).

20306725193 is an equidigital number, since it uses as much as digits as its factorization.

20306725193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 38.

The spelling of 20306725193 in words is "twenty billion, three hundred six million, seven hundred twenty-five thousand, one hundred ninety-three".