18873665 has 8 divisors (see below), whose sum is σ = 22768128. Its totient is φ = 15019120.

The previous prime is 18873661. The next prime is 18873691. The reversal of 18873665 is 56637881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18873665 - 2² = 18873661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18873661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8927 + ... + 10836.

It is an arithmetic number, because the mean of its divisors is an integer number (2846016).

Almost surely, 2^18873665 is an apocalyptic number.

It is an amenable number.

18873665 is a deficient number, since it is larger than the sum of its proper divisors (3894463).

18873665 is a wasteful number, since it uses less digits than its factorization.

18873665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19959.

The product of its digits is 241920, while the sum is 44.

The square root of 18873665 is about 4344.3831552937. The cubic root of 18873665 is about 266.2474236932.

The spelling of 18873665 in words is "eighteen million, eight hundred seventy-three thousand, six hundred sixty-five".