18078673 has 8 divisors (see below), whose sum is σ = 18775296. Its totient is φ = 17389200.

The previous prime is 18078649. The next prime is 18078719. The reversal of 18078673 is 37687081.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18078673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18078623) 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, 3678 + ... + 7048.

It is an arithmetic number, because the mean of its divisors is an integer number (2346912).

Almost surely, 2^18078673 is an apocalyptic number.

It is an amenable number.

18078673 is a deficient number, since it is larger than the sum of its proper divisors (696623).

18078673 is a wasteful number, since it uses less digits than its factorization.

18078673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3575.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 18078673 is about 4251.9022801565. The cubic root of 18078673 is about 262.4554022496.

The spelling of 18078673 in words is "eighteen million, seventy-eight thousand, six hundred seventy-three".