18025446813 has 16 divisors (see below), whose sum is σ = 27598771200. Its totient is φ = 10349538480.

The previous prime is 18025446809. The next prime is 18025446821. The reversal of 18025446813 is 31864452081.

It is a happy number.

It is not a de Polignac number, because 18025446813 - 2² = 18025446809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18025446823) 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 15 ways as a sum of consecutive naturals, for example, 14373733 + ... + 14374986.

It is an arithmetic number, because the mean of its divisors is an integer number (1724923200).

Almost surely, 2^18025446813 is an apocalyptic number.

It is an amenable number.

18025446813 is a deficient number, since it is larger than the sum of its proper divisors (9573324387).

18025446813 is a wasteful number, since it uses less digits than its factorization.

18025446813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28748752.

The product of its (nonzero) digits is 184320, while the sum is 42.

Adding to 18025446813 its reverse (31864452081), we get a palindrome (49889898894).

The spelling of 18025446813 in words is "eighteen billion, twenty-five million, four hundred forty-six thousand, eight hundred thirteen".