18425025498881 has 2 divisors, whose sum is σ = 18425025498882. Its totient is φ = 18425025498880.

The previous prime is 18425025498751. The next prime is 18425025498889. The reversal of 18425025498881 is 18889452052481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12665121498481 + 5759904000400 = 3558809^2 + 2399980^2 .

It is an emirp because it is prime and its reverse (18889452052481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18425025498881 - 2²² = 18425021304577 is a prime.

It is a super-2 number, since 2×18425025498881² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18425025498889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9212512749440 + 9212512749441.

It is an arithmetic number, because the mean of its divisors is an integer number (9212512749441).

Almost surely, 2^{18425025498881} is an apocalyptic number.

It is an amenable number.

18425025498881 is a deficient number, since it is larger than the sum of its proper divisors (1).

18425025498881 is an equidigital number, since it uses as much as digits as its factorization.

18425025498881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58982400, while the sum is 65.

The spelling of 18425025498881 in words is "eighteen trillion, four hundred twenty-five billion, twenty-five million, four hundred ninety-eight thousand, eight hundred eighty-one".