18670385 has 16 divisors (see below), whose sum is σ = 23555136. Its totient is φ = 14188608.

The previous prime is 18670367. The next prime is 18670387. The reversal of 18670385 is 58307681.

It is a cyclic number.

It is not a de Polignac number, because 18670385 - 2⁶ = 18670321 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18670387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6782 + ... + 9128.

It is an arithmetic number, because the mean of its divisors is an integer number (1472196).

Almost surely, 2^18670385 is an apocalyptic number.

It is an amenable number.

18670385 is a deficient number, since it is larger than the sum of its proper divisors (4884751).

18670385 is a wasteful number, since it uses less digits than its factorization.

18670385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2432.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 18670385 is about 4320.9240909787. The cubic root of 18670385 is about 265.2880930011.

The spelling of 18670385 in words is "eighteen million, six hundred seventy thousand, three hundred eighty-five".