18492444 has 18 divisors (see below), whose sum is σ = 46744880. Its totient is φ = 6164136.

The previous prime is 18492443. The next prime is 18492457. The reversal of 18492444 is 44429481.

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

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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: 513679 = 18492444 / (1 + 8 + 4 + 9 + 2 + 4 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 18492399 and 18492408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18492443) 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, 256804 + ... + 256875.

Almost surely, 2^18492444 is an apocalyptic number.

It is an amenable number.

18492444 is an abundant number, since it is smaller than the sum of its proper divisors (28252436).

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

18492444 is a wasteful number, since it uses less digits than its factorization.

18492444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513689 (or 513684 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 18492444 is about 4300.2841766562. The cubic root of 18492444 is about 264.4426115156.

The spelling of 18492444 in words is "eighteen million, four hundred ninety-two thousand, four hundred forty-four".