20025704617 has 2 divisors, whose sum is σ = 20025704618. Its totient is φ = 20025704616.

The previous prime is 20025704609. The next prime is 20025704687. The reversal of 20025704617 is 71640752002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12713915536 + 7311789081 = 112756^2 + 85509^2 .

It is a cyclic number.

It is not a de Polignac number, because 20025704617 - 2³ = 20025704609 is a prime.

It is not a weakly prime, because it can be changed into another prime (20025704687) 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, 10012852308 + 10012852309.

It is an arithmetic number, because the mean of its divisors is an integer number (10012852309).

Almost surely, 2^20025704617 is an apocalyptic number.

It is an amenable number.

20025704617 is a deficient number, since it is larger than the sum of its proper divisors (1).

20025704617 is an equidigital number, since it uses as much as digits as its factorization.

20025704617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 34.

The spelling of 20025704617 in words is "twenty billion, twenty-five million, seven hundred four thousand, six hundred seventeen".