18343844 has 12 divisors (see below), whose sum is σ = 32554368. Its totient is φ = 9042600.

The previous prime is 18343813. The next prime is 18343849. The reversal of 18343844 is 44834381.

It is a super-2 number, since 2×18343844² = 672993225392672, which contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18343849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32012 + ... + 32579.

It is an arithmetic number, because the mean of its divisors is an integer number (2712864).

Almost surely, 2^18343844 is an apocalyptic number.

It is an amenable number.

18343844 is a deficient number, since it is larger than the sum of its proper divisors (14210524).

18343844 is a wasteful number, since it uses less digits than its factorization.

18343844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64666 (or 64664 counting only the distinct ones).

The product of its digits is 36864, while the sum is 35.

The square root of 18343844 is about 4282.9713984569. The cubic root of 18343844 is about 263.7323772507.

The spelling of 18343844 in words is "eighteen million, three hundred forty-three thousand, eight hundred forty-four".