18352213 has 8 divisors (see below), whose sum is σ = 20262816. Its totient is φ = 16482000.

The previous prime is 18352199. The next prime is 18352219. The reversal of 18352213 is 31225381.

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 18352213 - 2¹³ = 18344021 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 (18352219) 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, 9138 + ... + 10963.

It is an arithmetic number, because the mean of its divisors is an integer number (2532852).

Almost surely, 2^18352213 is an apocalyptic number.

It is an amenable number.

18352213 is a deficient number, since it is larger than the sum of its proper divisors (1910603).

18352213 is a wasteful number, since it uses less digits than its factorization.

18352213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20195.

The product of its digits is 1440, while the sum is 25.

The square root of 18352213 is about 4283.9482956730. The cubic root of 18352213 is about 263.7724786364.

Adding to 18352213 its reverse (31225381), we get a palindrome (49577594).

The spelling of 18352213 in words is "eighteen million, three hundred fifty-two thousand, two hundred thirteen".