18025446812 has 6 divisors (see below), whose sum is σ = 31544531928. Its totient is φ = 9012723404.

The previous prime is 18025446809. The next prime is 18025446821. The reversal of 18025446812 is 21864452081.

It is a self number, because there is not a number n which added to its sum of digits gives 18025446812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2253180848 + ... + 2253180855.

It is an arithmetic number, because the mean of its divisors is an integer number (5257421988).

Almost surely, 2^18025446812 is an apocalyptic number.

It is an amenable number.

18025446812 is a deficient number, since it is larger than the sum of its proper divisors (13519085116).

18025446812 is a wasteful number, since it uses less digits than its factorization.

18025446812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4506361707 (or 4506361705 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 41.

Adding to 18025446812 its reverse (21864452081), we get a palindrome (39889898893).

The spelling of 18025446812 in words is "eighteen billion, twenty-five million, four hundred forty-six thousand, eight hundred twelve".