18025446811 has 4 divisors (see below), whose sum is σ = 18040114800. Its totient is φ = 18010778824.

The previous prime is 18025446809. The next prime is 18025446821. The reversal of 18025446811 is 11864452081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18025446811 - 2¹ = 18025446809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18025446821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7332151 + ... + 7334608.

It is an arithmetic number, because the mean of its divisors is an integer number (4510028700).

Almost surely, 2^18025446811 is an apocalyptic number.

18025446811 is a deficient number, since it is larger than the sum of its proper divisors (14667989).

18025446811 is a wasteful number, since it uses less digits than its factorization.

18025446811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14667988.

The product of its (nonzero) digits is 61440, while the sum is 40.

Adding to 18025446811 its reverse (11864452081), we get a palindrome (29889898892).

The spelling of 18025446811 in words is "eighteen billion, twenty-five million, four hundred forty-six thousand, eight hundred eleven".