18945195625 has 20 divisors (see below), whose sum is σ = 23758385508. Its totient is φ = 15102080000.

The previous prime is 18945195623. The next prime is 18945195631. The reversal of 18945195625 is 52659154981.

It can be written as a sum of positive squares in 10 ways, for example, as 6728756841 + 12216438784 = 82029^2 + 110528^2 .

It is not a de Polignac number, because 18945195625 - 2¹ = 18945195623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18945195623) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 121689 + ... + 229561.

Almost surely, 2^18945195625 is an apocalyptic number.

It is an amenable number.

18945195625 is a deficient number, since it is larger than the sum of its proper divisors (4813189883).

18945195625 is an equidigital number, since it uses as much as digits as its factorization.

18945195625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108174 (or 108159 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 55.

The spelling of 18945195625 in words is "eighteen billion, nine hundred forty-five million, one hundred ninety-five thousand, six hundred twenty-five".