18936449 has 8 divisors (see below), whose sum is σ = 22388160. Its totient is φ = 15671376.

The previous prime is 18936433. The next prime is 18936451. The reversal of 18936449 is 94463981.

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

It is not a de Polignac number, because 18936449 - 2⁴ = 18936433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18936409) 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, 46439 + ... + 46844.

It is an arithmetic number, because the mean of its divisors is an integer number (2798520).

Almost surely, 2^18936449 is an apocalyptic number.

It is an amenable number.

18936449 is a deficient number, since it is larger than the sum of its proper divisors (3451711).

18936449 is an equidigital number, since it uses as much as digits as its factorization.

18936449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93319.

The product of its digits is 186624, while the sum is 44.

The square root of 18936449 is about 4351.6030379620. The cubic root of 18936449 is about 266.5423244956.

The spelling of 18936449 in words is "eighteen million, nine hundred thirty-six thousand, four hundred forty-nine".