18935244 has 18 divisors (see below), whose sum is σ = 47864180. Its totient is φ = 6311736.

The previous prime is 18935243. The next prime is 18935261. The reversal of 18935244 is 44253981.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 525979 = 18935244 / (1 + 8 + 9 + 3 + 5 + 2 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 18935199 and 18935208.

It is not an unprimeable number, because it can be changed into a prime (18935243) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 262954 + ... + 263025.

Almost surely, 2^18935244 is an apocalyptic number.

It is an amenable number.

18935244 is an abundant number, since it is smaller than the sum of its proper divisors (28928936).

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

18935244 is a wasteful number, since it uses less digits than its factorization.

18935244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525989 (or 525984 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 18935244 is about 4351.4645810348. The cubic root of 18935244 is about 266.5366706670.

The spelling of 18935244 in words is "eighteen million, nine hundred thirty-five thousand, two hundred forty-four".