18196213 has 8 divisors (see below), whose sum is σ = 20822528. Its totient is φ = 15576624.

The previous prime is 18196201. The next prime is 18196219. The reversal of 18196213 is 31269181.

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

It is not a de Polignac number, because 18196213 - 2¹⁷ = 18065141 is a prime.

It is a super-3 number, since 3×18196213³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18196219) 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, 7420 + ... + 9562.

It is an arithmetic number, because the mean of its divisors is an integer number (2602816).

Almost surely, 2^18196213 is an apocalyptic number.

It is an amenable number.

18196213 is a deficient number, since it is larger than the sum of its proper divisors (2626315).

18196213 is a wasteful number, since it uses less digits than its factorization.

18196213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3363.

The product of its digits is 2592, while the sum is 31.

The square root of 18196213 is about 4265.7019352036. The cubic root of 18196213 is about 263.0229658944.

The spelling of 18196213 in words is "eighteen million, one hundred ninety-six thousand, two hundred thirteen".