18022203987 has 8 divisors (see below), whose sum is σ = 24423533520. Its totient is φ = 11817838560.

The previous prime is 18022203967. The next prime is 18022204027. The reversal of 18022203987 is 78930222081.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18022203987 - 2⁶ = 18022203923 is a prime.

It is a super-3 number, since 3×18022203987³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (18022203967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49240812 + ... + 49241177.

It is an arithmetic number, because the mean of its divisors is an integer number (3052941690).

Almost surely, 2^18022203987 is an apocalyptic number.

18022203987 is a deficient number, since it is larger than the sum of its proper divisors (6401329533).

18022203987 is an equidigital number, since it uses as much as digits as its factorization.

18022203987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98482053.

The product of its (nonzero) digits is 96768, while the sum is 42.

The spelling of 18022203987 in words is "eighteen billion, twenty-two million, two hundred three thousand, nine hundred eighty-seven".