18900219 has 8 divisors (see below), whose sum is σ = 27138832. Its totient is φ = 11630880.

The previous prime is 18900187. The next prime is 18900223. The reversal of 18900219 is 91200981.

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

It is not a de Polignac number, because 18900219 - 2⁵ = 18900187 is a prime.

It is a super-2 number, since 2×18900219² = 714436556495922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18900239) 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, 242272 + ... + 242349.

It is an arithmetic number, because the mean of its divisors is an integer number (3392354).

Almost surely, 2^18900219 is an apocalyptic number.

18900219 is a deficient number, since it is larger than the sum of its proper divisors (8238613).

18900219 is a wasteful number, since it uses less digits than its factorization.

18900219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484637.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 18900219 is about 4347.4382111768. The cubic root of 18900219 is about 266.3722293600.

The spelling of 18900219 in words is "eighteen million, nine hundred thousand, two hundred nineteen".