18396349 has 4 divisors (see below), whose sum is σ = 18427264. Its totient is φ = 18365436.

The previous prime is 18396347. The next prime is 18396359. The reversal of 18396349 is 94369381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94369381 = 5519 ⋅17099.

It is a cyclic number.

It is not a de Polignac number, because 18396349 - 2¹ = 18396347 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 (18396347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14547 + ... + 15760.

It is an arithmetic number, because the mean of its divisors is an integer number (4606816).

Almost surely, 2^18396349 is an apocalyptic number.

It is an amenable number.

18396349 is a deficient number, since it is larger than the sum of its proper divisors (30915).

18396349 is an equidigital number, since it uses as much as digits as its factorization.

18396349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30914.

The product of its digits is 139968, while the sum is 43.

The square root of 18396349 is about 4289.0965249106. The cubic root of 18396349 is about 263.9837618188.

The spelling of 18396349 in words is "eighteen million, three hundred ninety-six thousand, three hundred forty-nine".