18022015 has 8 divisors (see below), whose sum is σ = 23592528. Its totient is φ = 13106880.

The previous prime is 18022007. The next prime is 18022019. The reversal of 18022015 is 51022081.

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

It is not a de Polignac number, because 18022015 - 2³ = 18022007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18021983 and 18022001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18022019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163782 + ... + 163891.

It is an arithmetic number, because the mean of its divisors is an integer number (2949066).

Almost surely, 2^18022015 is an apocalyptic number.

18022015 is a deficient number, since it is larger than the sum of its proper divisors (5570513).

18022015 is a wasteful number, since it uses less digits than its factorization.

18022015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327689.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 18022015 is about 4245.2343869332. The cubic root of 18022015 is about 262.1809396359.

Adding to 18022015 its reverse (51022081), we get a palindrome (69044096).

The spelling of 18022015 in words is "eighteen million, twenty-two thousand, fifteen".