18196449 has 4 divisors (see below), whose sum is σ = 24261936. Its totient is φ = 12130964.

The previous prime is 18196447. The next prime is 18196459. The reversal of 18196449 is 94469181.

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.

It is a cyclic number.

It is not a de Polignac number, because 18196449 - 2¹ = 18196447 is a prime.

It is a super-2 number, since 2×18196449² = 662221512419202, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18196449.

It is not an unprimeable number, because it can be changed into a prime (18196441) 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, 3032739 + ... + 3032744.

It is an arithmetic number, because the mean of its divisors is an integer number (6065484).

Almost surely, 2^18196449 is an apocalyptic number.

It is an amenable number.

18196449 is a deficient number, since it is larger than the sum of its proper divisors (6065487).

18196449 is an equidigital number, since it uses as much as digits as its factorization.

18196449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6065486.

The product of its digits is 62208, while the sum is 42.

The square root of 18196449 is about 4265.7295976187. The cubic root of 18196449 is about 263.0241030019.

The spelling of 18196449 in words is "eighteen million, one hundred ninety-six thousand, four hundred forty-nine".