18433944 has 48 divisors (see below), whose sum is σ = 50122800. Its totient is φ = 6120384.

The previous prime is 18433931. The next prime is 18433949. The reversal of 18433944 is 44933481.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 18433899 and 18433908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18433949) 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 11 ways as a sum of consecutive naturals, for example, 35962 + ... + 36470.

It is an arithmetic number, because the mean of its divisors is an integer number (1044225).

Almost surely, 2^18433944 is an apocalyptic number.

It is an amenable number.

18433944 is an abundant number, since it is smaller than the sum of its proper divisors (31688856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18433944 is a wasteful number, since it uses less digits than its factorization.

18433944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024 (or 1017 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 18433944 is about 4293.4769127131. The cubic root of 18433944 is about 264.1634662555.

The spelling of 18433944 in words is "eighteen million, four hundred thirty-three thousand, nine hundred forty-four".