18426344 has 8 divisors (see below), whose sum is σ = 34549410. Its totient is φ = 9213168.

The previous prime is 18426337. The next prime is 18426347. The reversal of 18426344 is 44362481.

It can be written as a sum of positive squares in only one way, i.e., 17724100 + 702244 = 4210^2 + 838^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 18426344.

It is not an unprimeable number, because it can be changed into a prime (18426347) 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 as a sum of consecutive naturals, namely, 1151639 + ... + 1151654.

Almost surely, 2^18426344 is an apocalyptic number.

It is an amenable number.

18426344 is a deficient number, since it is larger than the sum of its proper divisors (16123066).

18426344 is a wasteful number, since it uses less digits than its factorization.

18426344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2303299 (or 2303295 counting only the distinct ones).

The product of its digits is 18432, while the sum is 32.

The square root of 18426344 is about 4292.5917579010. The cubic root of 18426344 is about 264.1271579048.

The spelling of 18426344 in words is "eighteen million, four hundred twenty-six thousand, three hundred forty-four".