18672005 has 8 divisors (see below), whose sum is σ = 24443424. Its totient is φ = 13579600.

The previous prime is 18671993. The next prime is 18672053. The reversal of 18672005 is 50027681.

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

It is not a de Polignac number, because 18672005 - 2⁶ = 18671941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169691 + ... + 169800.

It is an arithmetic number, because the mean of its divisors is an integer number (3055428).

Almost surely, 2^18672005 is an apocalyptic number.

It is an amenable number.

18672005 is a deficient number, since it is larger than the sum of its proper divisors (5771419).

18672005 is a wasteful number, since it uses less digits than its factorization.

18672005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339507.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 18672005 is about 4321.1115468129. Note that the first 3 decimals coincide. The cubic root of 18672005 is about 265.2957656564.

Adding to 18672005 its reverse (50027681), we get a palindrome (68699686).

The spelling of 18672005 in words is "eighteen million, six hundred seventy-two thousand, five".