18244913 has 4 divisors (see below), whose sum is σ = 18297840. Its totient is φ = 18191988.

The previous prime is 18244909. The next prime is 18244931. The reversal of 18244913 is 31944281.

It is a happy number.

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 18244913 - 2² = 18244909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18244913.

It is not an unprimeable number, because it can be changed into a prime (18244903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25943 + ... + 26636.

It is an arithmetic number, because the mean of its divisors is an integer number (4574460).

Almost surely, 2^18244913 is an apocalyptic number.

It is an amenable number.

18244913 is a deficient number, since it is larger than the sum of its proper divisors (52927).

18244913 is an equidigital number, since it uses as much as digits as its factorization.

18244913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52926.

The product of its digits is 6912, while the sum is 32.

The square root of 18244913 is about 4271.4064428476. The cubic root of 18244913 is about 263.2574067631.

The spelling of 18244913 in words is "eighteen million, two hundred forty-four thousand, nine hundred thirteen".