18025446819 has 4 divisors (see below), whose sum is σ = 24033929096. Its totient is φ = 12016964544.

The previous prime is 18025446809. The next prime is 18025446821. The reversal of 18025446819 is 91864452081.

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

It is not a de Polignac number, because 18025446819 - 2⁵ = 18025446787 is a prime.

It is a super-2 number, since 2×18025446819² (a number of 21 digits) contains 22 as substring.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 3004241134 + ... + 3004241139.

It is an arithmetic number, because the mean of its divisors is an integer number (6008482274).

Almost surely, 2^18025446819 is an apocalyptic number.

18025446819 is a deficient number, since it is larger than the sum of its proper divisors (6008482277).

18025446819 is an equidigital number, since it uses as much as digits as its factorization.

18025446819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6008482276.

The product of its (nonzero) digits is 552960, while the sum is 48.

The spelling of 18025446819 in words is "eighteen billion, twenty-five million, four hundred forty-six thousand, eight hundred nineteen".