18289219 has 8 divisors (see below), whose sum is σ = 19878320. Its totient is φ = 16726176.

The previous prime is 18289217. The next prime is 18289231. The reversal of 18289219 is 91298281.

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 18289219 - 2¹ = 18289217 is a prime.

It is a super-2 number, since 2×18289219² = 668991063259922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18289213) 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, 5037 + ... + 7870.

It is an arithmetic number, because the mean of its divisors is an integer number (2484790).

Almost surely, 2^18289219 is an apocalyptic number.

18289219 is a deficient number, since it is larger than the sum of its proper divisors (1589101).

18289219 is a wasteful number, since it uses less digits than its factorization.

18289219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13029.

The product of its digits is 20736, while the sum is 40.

The square root of 18289219 is about 4276.5896459679. The cubic root of 18289219 is about 263.4703328510.

It can be divided in two parts, 182 and 89219, that added together give a square (89401 = 299²).

The spelling of 18289219 in words is "eighteen million, two hundred eighty-nine thousand, two hundred nineteen".