18074213 has 4 divisors (see below), whose sum is σ = 19137420. Its totient is φ = 17011008.

The previous prime is 18074141. The next prime is 18074227. The reversal of 18074213 is 31247081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31247081 = 4549 ⋅6869.

It can be written as a sum of positive squares in 2 ways, for example, as 15194404 + 2879809 = 3898^2 + 1697^2 .

It is a cyclic number.

It is not a de Polignac number, because 18074213 - 2¹⁰ = 18073189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18074293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531578 + ... + 531611.

It is an arithmetic number, because the mean of its divisors is an integer number (4784355).

Almost surely, 2^18074213 is an apocalyptic number.

It is an amenable number.

18074213 is a deficient number, since it is larger than the sum of its proper divisors (1063207).

18074213 is a wasteful number, since it uses less digits than its factorization.

18074213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063206.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 18074213 is about 4251.3777766743. The cubic root of 18074213 is about 262.4338179337.

The spelling of 18074213 in words is "eighteen million, seventy-four thousand, two hundred thirteen".