18864441 has 32 divisors (see below), whose sum is σ = 30049920. Its totient is φ = 11653632.

The previous prime is 18864431. The next prime is 18864467. The reversal of 18864441 is 14446881.

18864441 is a `hidden beast` number, since 1 + 8 + 8 + 644 + 4 + 1 = 666.

It is not a de Polignac number, because 18864441 - 2⁵ = 18864409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18864396 and 18864405.

It is not an unprimeable number, because it can be changed into a prime (18864431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33226 + ... + 33788.

It is an arithmetic number, because the mean of its divisors is an integer number (939060).

Almost surely, 2^18864441 is an apocalyptic number.

It is an amenable number.

18864441 is a deficient number, since it is larger than the sum of its proper divisors (11185479).

18864441 is a wasteful number, since it uses less digits than its factorization.

18864441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662 (or 656 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 18864441 is about 4343.3214249005. The cubic root of 18864441 is about 266.2040428514.

The spelling of 18864441 in words is "eighteen million, eight hundred sixty-four thousand, four hundred forty-one".