18025446806 has 16 divisors (see below), whose sum is σ = 28664707200. Its totient is φ = 8486259840.

The previous prime is 18025446787. The next prime is 18025446809. The reversal of 18025446806 is 60864452081.

It is a happy number.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3926531 + ... + 3931118.

It is an arithmetic number, because the mean of its divisors is an integer number (1791544200).

Almost surely, 2^18025446806 is an apocalyptic number.

18025446806 is a deficient number, since it is larger than the sum of its proper divisors (10639260394).

18025446806 is a wasteful number, since it uses less digits than its factorization.

18025446806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7857719.

The product of its (nonzero) digits is 368640, while the sum is 44.

Adding to 18025446806 its reverse (60864452081), we get a palindrome (78889898887).

The spelling of 18025446806 in words is "eighteen billion, twenty-five million, four hundred forty-six thousand, eight hundred six".