18025446808 has 24 divisors (see below), whose sum is σ = 34360913340. Its totient is φ = 8864959200.

The previous prime is 18025446787. The next prime is 18025446809. The reversal of 18025446808 is 80864452081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18025446809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 272998 + ... + 332533.

Almost surely, 2^18025446808 is an apocalyptic number.

It is an amenable number.

18025446808 is a deficient number, since it is larger than the sum of its proper divisors (16335466532).

18025446808 is an equidigital number, since it uses as much as digits as its factorization.

18025446808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605659 (or 605594 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 46.

Adding to 18025446808 its reverse (80864452081), we get a palindrome (98889898889).

The spelling of 18025446808 in words is "eighteen billion, twenty-five million, four hundred forty-six thousand, eight hundred eight".