18022213 has 8 divisors (see below), whose sum is σ = 19805760. Its totient is φ = 16262880.

The previous prime is 18022201. The next prime is 18022217. The reversal of 18022213 is 31222081.

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

It is a cyclic number.

It is not a de Polignac number, because 18022213 - 2¹³ = 18014021 is a prime.

It is a super-2 number, since 2×18022213² = 649600322834738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18022217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4473 + ... + 7486.

It is an arithmetic number, because the mean of its divisors is an integer number (2475720).

Almost surely, 2^18022213 is an apocalyptic number.

It is an amenable number.

18022213 is a deficient number, since it is larger than the sum of its proper divisors (1783547).

18022213 is a wasteful number, since it uses less digits than its factorization.

18022213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12107.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 18022213 is about 4245.2577071363. The cubic root of 18022213 is about 262.1818997882.

Adding to 18022213 its reverse (31222081), we get a palindrome (49244294).

The spelling of 18022213 in words is "eighteen million, twenty-two thousand, two hundred thirteen".